Emails Show Early US Concerns Over Gaza Offensive, Risk of Israeli War Crimes

Massive destruction in Khan Yunis, southern Gaza Strip, as a result of Israeli bombing (Reuters)
Massive destruction in Khan Yunis, southern Gaza Strip, as a result of Israeli bombing (Reuters)
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Emails Show Early US Concerns Over Gaza Offensive, Risk of Israeli War Crimes

Massive destruction in Khan Yunis, southern Gaza Strip, as a result of Israeli bombing (Reuters)
Massive destruction in Khan Yunis, southern Gaza Strip, as a result of Israeli bombing (Reuters)

As Israel pounded northern Gaza with air strikes last October and ordered the evacuation of more than a million Palestinians from the area, a senior Pentagon official delivered a blunt warning to the White House.
The mass evacuation would be a humanitarian disaster and could violate international law, leading to war crime charges against Israel, Dana Stroul, then the deputy assistant secretary of defense for the Middle East, wrote in an Oct. 13 email to senior aides to President Joe Biden. Stroul was relaying an assessment by the International Committee of the Red Cross that had left her “chilled to the bone,” she wrote.
As the Gaza war nears its first anniversary and the Middle East teeters on the brink of a wider war, Stroul’s email and other previously unreported communications show the Biden administration’s struggle to balance internal concerns over rising deaths in Gaza with its public support for Jerusalem following the Hamas attack on southern Israel on Oct. 7 that killed 1,200 people.
Reuters reviewed three sets of email exchanges between senior US administration officials, dated Oct. 11 to 14, just days into the crisis. The fighting has led to more than 40,000 deaths in Gaza and spurred US protests led by Arab-Americans and Muslim activists.
The emails, which haven’t been reported before, reveal alarm early on in the State Department and Pentagon that a rising death toll in Gaza could violate international law and jeopardize US ties in the Arab world. The messages also show internal pressure in the Biden administration to shift its messaging from showing solidarity with Israel to including sympathy for Palestinians and the need to allow more humanitarian aid into Gaza.
A ceasefire deal remains elusive, despite months of US-brokered negotiations. Much of Gaza is now a wasteland. And the risk of a regional war with Iran looms after Israel’s attacks on military targets in Lebanon and last week’s assassination of Iranian-backed Hezbollah militia leader Hassan Nasrallah.
Top Biden administration officials say they believe White House pressure on Israeli Prime Minister Benjamin Netanyahu’s government in those early days made a difference, preventing an even worse disaster. In private talks, the White House asked Israel to delay its ground offensive to give more time for aid groups to prepare help for displaced people and to give Israel more time to strike a deal with Hamas, administration officials told reporters in background briefings at the time.
But Washington was slow to address the suffering of Palestinians, said three senior US officials involved in the decision-making process. And while the ground invasion was ultimately delayed by about 10 days, the three officials attributed the pause more to operational preparations by the Israeli military than US pressure.
After publication of this story, Democratic Senator Chris Van Hollen said the emails show that "unfolding humanitarian disaster in Gaza was painfully clear from the earliest days of the war, with key experts warning that international standards were being violated" and that "valid concerns" were overridden by the White House.
In response to questions about the emails, the White House said, "The US has been leading international efforts to get humanitarian aid into Gaza” and “this is and will continue to be a top priority.” It added that before US “engagement, there was no food, water, or medicine getting into Gaza.”
Both Israeli and Hamas leaders are being investigated for alleged war crimes in the wake of the Hamas attacks. In June, a UN commission concluded there was credible evidence that Hamas and other armed Palestinian groups committed war crimes including torture and taking hostages. The commission also found evidence of Israeli war crimes from the country’s use of massive explosives in Gaza in the first months of the war.
The Biden administration and Vice President Kamala Harris’ presidential campaign remain caught between two powerful constituencies – pro-Israel Democrats and younger, pro-Palestinian progressives. Harris’ Republican rival, former President Donald Trump, says he would “settle” the war “fast” if he wins November’s presidential election, without detailing how. But foreign policy analysts say the election is unlikely to alter US policy toward Israel significantly, given both parties’ long support for the country.
The emails reviewed by Reuters show a scramble inside the Biden administration to warn the White House of the impending crisis – and the White House’s initial resistance to a ceasefire in the early, chaotic days of war. The three sets of email exchanges began on Oct. 11, during Israel’s fifth day of air strikes after the Hamas incursion.
“LOSING CREDIBILITY”
Early on, concerns grew inside the administration about America’s image with its Arab allies.
After Israeli airstrikes hit Gaza’s hospitals, schools and mosques, the US State Department’s top public diplomacy official, Bill Russo, told senior State officials that Washington was “losing credibility among Arabic-speaking audiences” by not directly addressing the humanitarian crisis, according to an Oct. 11 email. Gaza’s health authorities reported that day a death toll of about 1,200.
As Israel defended the strikes, saying Hamas was using civilian buildings for military purposes, Russo wrote that US diplomats in the Middle East were monitoring Arab media reports that accused Israel of waging a “genocide” and Washington of complicity in war crimes.
“The US’s lack of response on the humanitarian conditions for Palestinians is not only ineffective and counterproductive, but we are also being accused of being complicit to potential war crimes by remaining silent on Israel’s actions against civilians,” Russo wrote.
At the time, emergency workers were struggling to save people buried under rubble from Israel airstrikes and the world’s sympathies were beginning to shift from murdered Israelis to besieged Palestinian civilians.
Addressing State Department leaders, Russo urged quick action to shift the administration’s public stance of unqualified support for Israel and its military operation in Gaza. “If this course is not quickly reversed by not only messaging, but action, it risks damaging our stance in the region for years to come,” he wrote. Russo resigned in March, citing personal reasons. He declined to comment.
The State Department’s top Middle East diplomat, Barbara Leaf, forwarded Russo’s email to White House officials including Brett McGurk, Biden’s top adviser for Middle East affairs. She warned that the relationship with Washington’s “otherwise would-be stalwart” Arab partners was at risk due to the kinds of concerns raised by Russo.
McGurk replied that if the question was whether the administration should call for a ceasefire, the answer was “No.” He added, however, that Washington was “100 pct” in favor of supporting humanitarian corridors and protecting civilians. McGurk and Leaf declined to comment for this story.
Following Russo’s email, the public US stance remained largely unchanged for the next two days, a review of public comments shows. US officials continued to emphasize Israel’s right to defend itself and plans to provide Jerusalem with military aid.
“PUMP THE BREAKS”
On Oct. 13, two days after Russo’s email, Israeli aircraft dropped leaflets over northern Gaza, warning one million residents to leave their homes. Netanyahu gave residents 24 hours to flee as Israeli troops backed by tanks began a ground assault inside the Hamas-run territory of 2.3 million people. He vowed to annihilate Hamas for its attack.
The evacuation order alarmed aid agencies and the United Nations. By then, Israel’s air strikes had razed entire districts. The International Committee of the Red Cross (ICRC) in Geneva issued a statement saying Israel's order was "not compatible with international humanitarian law" because it would cut off food, water and other basic needs in Gaza. Privately, in a phone conversation that day with Stroul, ICRC Middle East director Fabrizio Carboni was more pointed, the emails show.
"ICRC is not ready to say this in public, but is raising private alarm that Israel is close to committing war crimes," Stroul said in her Oct. 13 email, describing the conversation. Her email was addressed to senior White House officials including McGurk, along with senior State and Pentagon officials. “Their main line is that it is impossible for one million civilians to move this fast,” Stroul wrote. One US official on the email chain said it would be impossible to carry out such an evacuation without creating a “humanitarian catastrophe.”
Asked about Carboni’s phone call with Stroul, the ICRC said it “constantly works with parties to armed conflicts and those who have influence with them to increase the respect for the laws of war in order to prevent civilian suffering in conflict. We consider such conversations to be strictly confidential.”
Publicly, the White House was expressing measured support for Israel’s plans. A White House spokesperson told reporters that such a huge evacuation was a "tall order" but that Washington would not second-guess Israel. US Defense Secretary Lloyd Austin said US military aid would continue flowing to Israel.
Privately, some senior US officials were concerned there was no safe way out of densely populated Gaza, several senior US officials told Reuters. Israel had imposed a blockade. Its southern neighbor, Egypt, would not open its borders as part of its long-standing policy to prevent a mass resettlement of Palestinians. Some Palestinians who fled northern Gaza were killed when Israel bombed cars and trucks.
In an email replying to Stroul, McGurk said Washington might be able to persuade Israel to extend the deadline for Palestinians to evacuate beyond 24 hours, saying the administration “can buy some time.” But the Red Cross, the UN and aid agencies should work with Egypt and Israel to prepare for the evacuation, he wrote.
McGurk, a long-time Iraq expert, likened the situation to the US-led military operation against ISIS militants in Mosul from 2016 to 2017, an assault that left the Iraqi city in ruins. He said the military and humanitarian strategy in the Mosul assault had been planned hand in hand. Two officials on the email chain replied that it would be impossible to put in place the necessary infrastructure with so little time. One reminded McGurk that the Mosul operation was the result of much longer planning. Humanitarian groups had months to set up and provide support for displaced civilians.
“Our assessment is that there’s simply no way to have this scale of a displacement without creating a humanitarian catastrophe,” Paula Tufro, a senior White House official in charge of humanitarian response, wrote in the email. It would take “months” to get structures in place to provide “basic services” to more than a million people. She asked that the White House tell Israel to slow its offensive.
“We need GOI (Government of Israel) to pump the brakes in pushing people south,” Tufro wrote.
Andrew Miller, then the deputy assistant secretary at the State Department’s Bureau of Near Eastern Affairs, urged his colleagues to act fast.
“If we’re inclined to weigh in with the Israelis to dissuade them from seeking mass evacuations, we will have to do it soon, at a high level and at multiple touch points,” Miller wrote. He resigned in June, citing family reasons.
Biden’s public comments on Gaza had largely given Netanyahu a free hand against Hamas. At the time, Biden faced only scattered protests from the left wing of the Democratic Party over his support for Israel's counterattack. Israel's likening of the Hamas assault to the Sept. 11, 2001, attacks on New York and Washington resonated widely in the US.
The administration’s public stance began to change on Oct. 13. At a news conference in Doha, US Secretary of State Antony Blinken for the first time publicly recognized the “suffering of Palestinian families in Gaza.” Washington was in constant talks with the Israelis and aid groups to help civilians in Gaza, he said.
The next day, Oct. 14, Biden’s rhetoric shifted. He said in a speech that he was urgently prioritizing the humanitarian crisis in Gaza and directed his team to help surge relief into the war zone. It is unclear if the emails by Russo and others influenced the statements from Blinken and Biden.
Although Israel began sending infantry into Gaza on Oct. 13, a large-scale ground invasion didn’t begin until Oct. 27. Sources familiar with the matter said at the time that Washington advised Israel to hold off, mainly to give time for diplomacy to free Israeli hostages held by Hamas.
From the early days of the conflict, the US stressed that Israel has a right to defend itself but that how it does so matters, a State Department spokesperson said in response to questions for this story. “Israel has a moral imperative to mitigate the harm of its operations to civilians, something we have emphasized both publicly and privately,” the spokesperson said.
Stroul and Tuffro declined to comment. In a statement, Miller said the administration was “concerned about the humanitarian implications of a mass evacuation.” He added that “Israeli military plans were very inchoate at that stage and we were trying to develop a better understanding” of Israel’s “strategy and objectives.”
WEAPONS EXPEDITED
As US officials assessed the humanitarian crisis, Israel pressed Washington for more arms.
On Oct. 14, a senior Israeli Embassy official in Washington urged the State Department to accelerate shipment of 20,000 automatic rifles for the Israeli National Police, according to the emails.
Israeli senior defense advisor Ori Katzav apologized in an Oct. 14 email to his State Department counterpart for disturbing her on the weekend but said the rifle shipment was “very urgent” and needed US approval. Christine Minarich – an official at the State Department division that approves arms sales, the Directorate of Defense Trade Controls – told Katzav the rifles would not be approved in the next 24 to 48 hours. Such large weapons shipments can take time, requiring State Department approval and notification to Congress.
Katzav and the Israeli Embassy declined to comment.
Jessica Lewis, then the assistant US secretary for political and military affairs, forwarded Minarich’s email and Israel’s request for the rifles to the State Department’s Democracy, Labor and Human Rights (DRL) bureau. DRL reviews potential US weapon sales to ensure they aren’t sent to militaries involved in rights abuses.
Lewis asked the bureau to expedite its review and “urgently” explain any opposition to specific arms packages for Israel, according to the emails. Lewis resigned in July.
Christopher Le Mon, deputy assistant secretary at DRL, recommended denying more than a dozen arms packages, including grenade launchers, gun parts, rifles and spare rifle parts. In a reply to Lewis, he cited concerns about the “conduct” of specific Israeli National Police units, including the elite Yamam border patrol unit.
Le Mon wrote that there were “numerous reports” of Yamam’s involvement in “gross violations of human rights.” DRL raised objections against 16 separate arms packages for Israel, according to the email and a source familiar with the matter. Nearly all the shipments went ahead despite the bureau’s objections, the source said. Yamam’s missions eventually included a June 8 rescue of four Israeli hostages that Gaza health officials say killed more than 200 Palestinians.
Minarich, Le Mon, Lewis and the Israeli Embassy declined to comment.
Washington has sent to Israel large numbers of munitions since the Gaza war began, according to several US officials with knowledge of the matter, including thousands of precision-guided missiles and 2,000-pound bombs that can devastate densely populated areas and have been used to collapse tunnels and bunkers.
Some rights groups blame the use of those weapons for civilian deaths. Amnesty International cited at least three incidents from Oct. 10 to January 2024 involving US-supplied weapons that it said killed civilians, including women and children, in “serious violations” of international humanitarian law. In July, it warned of US complicity in what it said was Israel’s unlawful use of US weapons to commit war crimes – an accusation the US has rejected.
A State Department report in May said Israel may be violating international law using US weapons, but said it could not say so definitively due to the chaos of war and challenges in collecting data.
An Israeli Embassy spokesperson rejected accusations that Israel has targeted civilians. “Israel is a democracy that adheres to international law,” the spokesperson said.



Satellite Images Show Iran Repairing and Fortifying Sites amid US Tensions

A satellite image shows tunnel entrances covered with soil at Isfahan nuclear complex, in Isfahan, Iran, February 10, 2026. Vantor/Handout via REUTERS
A satellite image shows tunnel entrances covered with soil at Isfahan nuclear complex, in Isfahan, Iran, February 10, 2026. Vantor/Handout via REUTERS
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Satellite Images Show Iran Repairing and Fortifying Sites amid US Tensions

A satellite image shows tunnel entrances covered with soil at Isfahan nuclear complex, in Isfahan, Iran, February 10, 2026. Vantor/Handout via REUTERS
A satellite image shows tunnel entrances covered with soil at Isfahan nuclear complex, in Isfahan, Iran, February 10, 2026. Vantor/Handout via REUTERS

Satellite images show that Iran has recently built a concrete shield over a new facility at a sensitive military site and covered it in soil, experts say, advancing work at a location reportedly bombed by Israel in 2024 amid tensions with the US.

Images also show that Iran has buried tunnel entrances at a nuclear site bombed by the US during Israel's 12-day war with Iran last year, fortified tunnel entrances near another, and has repaired missile bases struck in the conflict.

They offer a glimpse of Iranian activities at some of the sites at the center of tensions with Israel and the US, as Washington seeks to negotiate a deal with Tehran on its nuclear program while threatening military action if talks fail.

Some 30 km (20 miles) southeast of Tehran, the Parchin complex is one of Iran's most sensitive military sites. Western intelligence has suggested Tehran carried out tests relevant to nuclear bomb detonations there more than two decades ago.

Iran has always denied seeking atomic weapons. Israel reportedly struck Parchin in October 2024.

Satellite imagery taken before and after that attack shows extensive damage to a rectangular building at Parchin, and apparent reconstruction in images from November 6, 2024.

Imagery from October 12, 2025 shows development at the site, with the skeleton of a new structure visible and two smaller structures adjacent to it. Progress is apparent in imagery from November 14, with what appears to be a metallic roof covering the large structure.

But imagery from December 13 shows the facility partly covered. By February 16, it cannot be seen at all, hidden by what experts say is a concrete structure.

The Institute for Science and International Security (ISIS), in a January 22 analysis of satellite imagery, pointed to progress in the construction of a "concrete sarcophagus" around a newly built facility at the site, which it identified as Taleghan 2.

ISIS reported in November that imagery showed "ongoing construction and the presence of what appears to resemble a long, cylindrical chamber, maybe a high-explosives containment vessel, likely measuring approximately 36 meters long and 12 meters in diameter placed inside a building".

"High-explosive containment vessels are critical to the development of nuclear weapons," ISIS added, "but can also be used in many other conventional weapons development processes."

William Goodhind, a forensic imagery analyst with Contested Ground, said the roof had a similar hue to the surrounding area, adding: "It has most likely been covered with dirt to obscure the concrete color."

ISIS founder David Albright wrote on X: "Stalling the negotiations has its benefits: Over the last two to three weeks, Iran has been busy burying the new Taleghan 2 facility ... More soil is available and the facility may soon become a fully unrecognizable bunker, providing significant protection from aerial strikes."

TUNNEL ENTRANCES BURIED AT ISFAHAN NUCLEAR COMPLEX

The Isfahan complex is one of three Iranian uranium-enrichment plants bombed by the United States in June.

In addition to facilities that are part of the nuclear fuel cycle, Isfahan includes an underground area where diplomats say much of Iran's enriched uranium has been stored.

Satellite images taken in late January showed new efforts to bury two tunnel entrances at the complex, ISIS reported on January 29. In a February 9 update, ISIS said a third entrance had also been backfilled with soil, meaning all entrances to the tunnel complex were now "completely buried".

A February 10 image shows all three tunnels buried, Goodhind said.

ISIS reported on February 9 that "backfilling the tunnel entrances would help dampen any potential airstrike and also make ground access in a special forces raid to seize or destroy any highly enriched uranium that may be housed inside difficult".

TUNNEL ENTRANCES FORTIFIED AT COMPLEX NEAR NATANZ SITE

ISIS has reported that satellite images point to ongoing efforts since February 10 to "harden and defensively strengthen" two entrances to a tunnel complex under a mountain some 2 km (1.2 miles) from Natanz - the site that holds Iran's other two uranium enrichment plants.

Imagery shows "ongoing activity throughout the complex related to this effort, involving the movement of numerous vehicles, including dump trucks, cement mixers, and other heavy equipment", ISIS wrote.

Iran's plans for the facility, called Pickaxe Mountain, are unclear, ISIS said.

SHIRAZ SOUTH MISSILE BASE

About 10 km (6 miles) south of Shiraz in southern Iran, this is one of 25 primary bases capable of launching medium-range ballistic missiles, according to Alma Research and Education Center, an Israeli organization. Alma assessed the site had suffered light, above-ground damage in last year's war.

A comparison of images taken on July 3, 2025 and January 30 shows reconstruction and clearance efforts at the main logistics and likely command compound at the base, Goodhind said.

"The key takeaway is that the compound has yet to return to its full operational capacity from prior to the airstrikes."

QOM MISSILE BASE

Some 40 km north of the city of Qom, this base suffered moderate above-ground damage, according to Alma.

A comparison of images taken between July 16, 2025, and February 1 shows a new roof over a damaged building. The roof repairs appear to have begun on November 17 and were most likely complete 10 days later, Goodhind said.


Iranian Mourning Ceremonies Prompt New Crackdowns in Echo of 1979 Revolution

Iranians walk on a street in Tehran, Iran, 16 February 2026. (EPA)
Iranians walk on a street in Tehran, Iran, 16 February 2026. (EPA)
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Iranian Mourning Ceremonies Prompt New Crackdowns in Echo of 1979 Revolution

Iranians walk on a street in Tehran, Iran, 16 February 2026. (EPA)
Iranians walk on a street in Tehran, Iran, 16 February 2026. (EPA)

Iranians have returned to the streets this week to mourn those killed by security forces during last month's anti-government demonstrations, sparking some new crackdowns in an echo of the 1979 revolution that brought down the US-backed Shah.

The anti-Shah revolutionaries turned Shiite Muslim memorial processions 40 days after each death into new protests, which prompted renewed violence from the authorities and fresh "martyrs" for the cause.

The clerical establishment's opponents, deploying the same tactics after five decades, have yet to match the momentum of those times, but Iran's clerical rulers, threatened with military attack by US President Donald Trump over their nuclear and security policies, have demonstrated their concern.

They deployed security forces to some cemeteries and invited citizens to attend state-organized 40-day "Chehelom" ceremonies on Tuesday after apologizing to "all those affected" by violence they blamed on people described as "terrorists".

"They tried to prevent history repeating itself by holding these ceremonies in mosques across ‌the country. To ‌prevent any gatherings of angry families in cemeteries, but they failed," said one rights activist ‌in ⁠Iran who declined ⁠to be named for fear of retribution.

SECURITY FORCES CLASH WITH MOURNERS

Videos circulating on social media showed families holding their own memorials across Iran on Tuesday, 40 days after security forces began two days of widespread shooting that human rights groups say killed thousands of protesters.

Some of Tuesday's memorials turned into wider anti-government protests and some were met with deadly force.

In the Kurdish town of Abdanan in Ilam province, witnesses and activists said security forces opened fire on hundreds of mourners gathered at a cemetery.

Videos showed people scattering as gunfire rang out amid chants of "Death to the dictator", a reference to Iran's Supreme Leader Ali Khamenei.

Reuters journalists verified that ⁠the videos were filmed at the cemetery. They were unable to verify the date but ‌found no versions posted before Tuesday: eyewitnesses and activists said that was when ‌people gathered at the cemetery were fired upon.

Hengaw, a Kurdish Iranian rights group, said at least three people were injured and nine ‌arrested in Abdanan. Similar clashes were reported in Mashhad and Hamedan. Sources in Iran said internet access was heavily restricted ‌in those cities.

WEDNESDAY IS 40 DAYS SINCE HEIGHT OF JANUARY PROTESTS

More mourning ceremonies were expected to be taking place on Wednesday, 40 days since the deadliest two days of the January unrest, although communications restrictions meant that it was not immediately possible to tell how many or their outcome.

January's unrest grew from modest economic protests in December among traders in Tehran's Grand Bazaar into the gravest threat to ‌Iran's theocracy in nearly five decades, with protesters calling for ruling clerics to step down.

Authorities cut internet access, blaming "armed terrorists" linked to Israel and the United States ⁠for the violence, and have arrested ⁠journalists, lawyers, activists, human rights advocates and students, rights groups say.

Iranian officials have told Reuters the leadership is worried a US strike could erode its grip on power by fueling more protests. Repression, inequality, corruption and the sponsorship of proxies abroad are the main grievances.

"How long can they kill people to stay in power? People are angry, people are frustrated," said government employee Sara, 28, from the central city of Isfahan.

"The Islamic Republic has brought nothing but war, economic misery and death to my country".

Trump has deployed aircraft carriers, fighter jets, guided-missile destroyers and other capabilities to the Middle East for a possible attack if talks to limit Iran's nuclear program and weaken its foreign proxies do not yield results.

Even without a US attack, continued isolation from Western sanctions would likely fuel further public anger.

In 1979, the anti-Shah revolt in provincial towns and villages was amplified by oil workers whose strikes cut most of Iran's revenue, and bazaar merchants who funded the rebel clerics.

This time there have been no reports of either, but people have adopted some of the small-scale tactics, chanting “Allah is great” and “Death to the dictator”, often from rooftops, during nightly demonstrations, according to witnesses and social media posts.


Iran ‘Drafting Framework to Advance’ Future US Talks, Says FM

Iranian Foreign Minister Abbas Araghchi speaks during the Conference on Disarmament at the European headquarters of the United Nations in Geneva, Switzerland, 17 February 2026. (EPA)
Iranian Foreign Minister Abbas Araghchi speaks during the Conference on Disarmament at the European headquarters of the United Nations in Geneva, Switzerland, 17 February 2026. (EPA)
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Iran ‘Drafting Framework to Advance’ Future US Talks, Says FM

Iranian Foreign Minister Abbas Araghchi speaks during the Conference on Disarmament at the European headquarters of the United Nations in Geneva, Switzerland, 17 February 2026. (EPA)
Iranian Foreign Minister Abbas Araghchi speaks during the Conference on Disarmament at the European headquarters of the United Nations in Geneva, Switzerland, 17 February 2026. (EPA)

Iran's top diplomat Abbas Araghchi said on Wednesday that Tehran was "drafting" a framework for future talks with the United States, as the US energy secretary said Washington would stop Iran's nuclear ambitions "one way or another".

Diplomatic efforts are underway to avert the possibility of US military intervention in Iran, with Washington conducting a military build-up in the region.

Iran and the US held a second round of Oman-mediated negotiations on Tuesday in Geneva, after talks last year collapsed following Israel's attack on Iran in June, which started a 12-day war.

Araghchi said on Tuesday that Tehran had agreed with Washington on "guiding principles", but US Vice President JD Vance said Tehran had not yet acknowledged all of Washington's "red lines".

On Wednesday, Araghchi held a phone call with Rafael Grossi, the head of the UN nuclear watchdog, the International Atomic Energy Agency.

In the call, Araghchi "stressed Iran's focus on drafting an initial and coherent framework to advance future talks", according to a statement from the Iranian foreign ministry.

Also on Wednesday, US Energy Secretary Chris Wright warned that Washington would deter Tehran from acquiring nuclear weapons "one way or the other".

"They've been very clear about what they would do with nuclear weapons. It's entirely unacceptable," Wright told reporters in Paris on the sidelines of meetings of the International Energy Agency.

Earlier on Wednesday, Reza Najafi, Iran's permanent representative to the IAEA in Vienna, held a joint meeting with Grossi and the ambassadors of China and Russia "to exchange views" on the upcoming session of the agency's board of governors meetings and "developments related to Iran's nuclear program", Iran's mission in Vienna said on X.

Tehran has suspended some cooperation with the IAEA and restricted the watchdog's inspectors from accessing sites bombed by Israel and the United States, accusing the UN body of bias and of failing to condemn the strikes.

- Displays of military might -

The Omani-mediated talks were aimed at averting the possibility of US military action, while Tehran is demanding the lifting of US sanctions that are crippling its economy.

Iran has insisted that the discussions be limited to the nuclear issue, though Washington has previously pushed for Tehran's ballistic missiles program and support for armed groups in the region to be on the table.

US President Donald Trump has repeatedly threatened to intervene militarily against Iran, first over a deadly crackdown on protesters last month and then more recently over its nuclear program.

On Wednesday, Israeli President Isaac Herzog sent a message to Iranians, saying "I want to send the people of Iran best wishes for the month of Ramadan, and I truly hope and pray that this reign of terror will end and that we will see a different era in the Middle East," according to a statement from his office.

Washington has ordered two aircraft carriers to the region, with the first, the USS Abraham Lincoln with nearly 80 aircraft, positioned about 700 kilometers (435 miles) from the Iranian coast as of Sunday, satellite images showed.

Iran has also sought to display its own military might, with its Islamic Revolutionary Guard Corps beginning a series of war games on Monday in the Strait of Hormuz.

Iranian politicians have repeatedly threatened to block the strait, a major global conduit for oil and gas.

On Tuesday, state TV reported that Tehran would close parts of the waterway for safety measures during the drills.

Iran's supreme leader warned on Tuesday that the country had the ability to sink a US warship deployed to the region.