Just hours after launching its military operation “Rising Lion” against Iran, Israel revealed an extensive and long-standing intelligence campaign conducted by its spy agency Mossad deep inside Iranian territory, especially in the capital, where it reportedly established a covert branch.
According to an Israeli security source on Friday, Mossad special units carried out a series of covert operations inside Iran in the lead-up to the strikes. These included deploying precision-guided weapons near surface-to-air missile sites, using advanced technology to disrupt Iranian air defenses, and establishing a drone launch base close to Tehran.
The source said Friday’s operation was a joint effort between the Israeli military, Mossad, and the country’s defense industry, built on years of meticulous planning and intelligence-gathering. Israeli media, including Yedioth Ahronoth, reported that Mossad had established the drone base long before the strike, with explosive-laden UAVs later launched toward Iranian missile sites.
The attack reflects Israel’s broader, long-term strategy toward Iran, built on the combined efforts of its military and intelligence services. While Iran has maintained that the strikes were conducted entirely from outside the country, seeking to avoid acknowledging serious internal security breaches, Israel insists that Mossad played a decisive role on the ground.
The agency is credited with assassinations of IRGC and Iranian military figures, data collection on nuclear scientists, and compiling a high-value target list.
An Israeli security source claimed Mossad established a “branch” inside Tehran, planting surveillance devices across dozens of locations and even executing sabotage operations near nuclear facilities and missile launch sites.
While some analysts view these claims as psychological warfare or propaganda, evidence from past operations suggests a degree of credibility. Over the years, Israel has conducted bold, complex missions inside Iran that appear too sophisticated to have originated solely from outside.
Mossad’s activity in Iran dates back years but intensified significantly in the last two. According to Israeli sources, the agency effectively set up a wide-reaching operational base inside Iran, complete with advanced equipment and transport assets.
Mossad has been linked to the assassinations of at least four Iranian nuclear scientists: Masoud Alimohammadi, Majid Shahriari, Darioush Rezaeinejad, and Mostafa Ahmadi Roshan - between 2010 and 2012 - most of them killed using magnetic bombs in central Tehran. In 2020, top nuclear scientist Mohsen Fakhrizadeh was assassinated in an ambush attributed to a Mossad unit.
The most high-profile operation came in 2018, when Mossad agents reportedly stole Iran’s nuclear archive, including 50,000 documents and 163 CDs, from a Tehran warehouse in a seven-hour raid. According to former Mossad chief Yossi Cohen, who oversaw the mission, the 20-member team (none of whom were Israeli nationals) operated inside Iran for two years before executing the mission undetected.
Though Iranian officials initially dismissed the scale of the operation, they later claimed to have arrested “all the terrorists” who helped Mossad, blaming opposition groups like the MEK. However, Israel insists it relied not on political dissidents, but on individuals disillusioned with the regime, mercenaries, and Western intelligence support.
A retired Mossad officer, known only as Brig. Gen. “A”, told the right-wing Israeli group The Guardians that Iran’s internal repression and isolation have left it vulnerable. He stressed the close cooperation between Mossad, Israeli military intelligence, and the defense industry in preparing for the confrontation with Iran.
Operation “Rising Lion,” launched this week, included direct strikes on neighborhoods housing top IRGC commanders in Tehran. Israeli Defense Minister Yoav Gallant described it as a “preemptive strike,” following warnings from US President Donald Trump about an imminent Israeli military operation targeting Iran’s nuclear infrastructure.
