President Donald Trump warned Iran on Monday that it would pay "many times over" for every US soldier it killed after Washington announced over the weekend three new military fatalities and one service member missing in action.
"Every time Iran kills an American Soldier they will pay for that killing many times over!" Trump posted on his platform, Truth Social.
"This directive has been passed on to Secretary of War, Pete Hegseth, Chairman of the Joint Chiefs of Staff, Daniel Caine, and every Leader in the Military."
Iran is fighting a "full-scale war" with the United States, its president said Monday, as Washington expanded its strikes across the country.
"The reality is that today Iran is engaged in a full-scale war," President Masoud Pezeshkian said, according to a presidency statement.
His comments came after state media and local authorities reported US strikes on Monday in the north and center of the country.
The Middle East war resumed after a weeks-long lull prompted by an agreement signed in June, and oil prices surged to a one-month high as the foes battled to control the vital Strait of Hormuz, through which a fifth of world oil travelled in peacetime.
As its truce with the US collapsed, Tehran reimposed its blockade of the waterway, while Washington hit back by again counter-blockading Iran's ports.
On Sunday, US Secretary of State Marco Rubio called on countries around the world to share the burden of protecting global shipping.
US Central Command (CENTCOM) said on Sunday that it successfully completed the ninth consecutive night of strikes against Iran, while Rubio said he would "continue to try" to reach a diplomatic solution.
- Diplomatic exchanges -
The fresh fighting came after a weekend in which the US announced three new US military fatalities and one service member missing in action.
Two were killed during Iranian missile and drone attacks on Jordan on Friday, while another service member was killed in northern Iraq during the controlled detonation of unexploded ordnance from a downed Iranian drone, CENTCOM said.
President Donald Trump said US strikes on Iran "hit them very hard" in honor of the American fatalities.
The deaths brought to 17 the confirmed number of US military fatalities since the conflict began.
On Friday, Iran's health ministry reported that 50 people had been killed in recent fighting and more than 500 wounded.
Despite the latest attacks, Iranian foreign ministry spokesman Esmaeil Baqaei said diplomatic exchanges with the US via mediators were ongoing.
"Ideas have been conveyed to us by certain mediators," he told a news conference in Tehran attended by AFP.
Iran's Interior Minister Eskandar Momeni was set to travel to mediator Pakistan's capital on Monday, a Pakistani interior ministry source told AFP, without confirming the reason.
Meanwhile Iran's Revolutionary Guards announced on Monday that they had hit targets in Syria, Jordan and Kuwait overnight.
Kuwait's military said on Monday afternoon it was responding to fresh missile and drone attacks.
Bahrain's interior ministry also said its air raid sirens had sounded and urged citizens and residents to head to "the nearest safe place".
Manama's civil aviation body said Iran had targeted its air navigation systems.
