Hostilities stepped up, with sirens sounding at least three times in Bahrain, home to the US Navy's 5th Fleet headquarters, and missiles targeting Kuwait and Qatar.
Sirens sounded Thursday afternoon in Jordan as well, where the US has stationed troops and aircraft.
An Iranian official accused the US of launching an air-strike later Thursday targeting the area around Iran's sole nuclear power plant, and other explosions were reported elsewhere in the country during the afternoon.
Early Friday, Supreme Leader Ayatollah Ali Khamenei was laid to rest in his hometown of Mashhad after days of public mourning. Khamenei was killed in the opening salvos of the Iran war.
The US strikes came hours after President Donald Trump said recent Iranian attacks on ships in the Strait of Hormuz signalled the end of a fragile ceasefire and threatened to escalate the conflict if they didn't stop.
That raised concerns that the region could tip back into a war that would engulf several countries and could halt energy shipments through the strait that are crucial for the global economy.
In Iran, the two days of American airstrikes have killed at least 14 people and wounded another 78, Iran's Health Ministry said Thursday. Most were reportedly members of the armed forces.
In Kuwait, the military said falling debris wounded one person as the nation shot down three ballistic missiles, a cruise missile and 10 drones. Bahrain said it shot down incoming fire, without elaborating, and Jordanian government spokesman Mohammad al-Momani said all incoming fire from Iran had been intercepted. Iranian state TV said the country's paramilitary Revolutionary Guard fired missiles at a US base in Jordan.
There was no immediate word of damage in Qatar.
The US military's Central Command said it hit 90 targets across Iran, releasing black-and-white footage of what appeared to be strikes on an airport runway and missile launchers.
The US said the strikes were intended to "further degrade" Iran's ability "to threaten freedom of navigation" in the strait, through which a fifth of the world's traded oil and natural gas passed before the war began with US and Israeli attacks on February 28.
Traffic has picked up somewhat since a tentative deal last month included opening the waterway. Maritime data company Lloyd's List Intelligence said Thursday that preliminary data showed at least 576 ships passed through the strait in June, compared to 233 in May. More than 3,100 transited the strait in June 2025.
Iranian state media reported explosions in several locations, including Bushehr, home to Iran's nuclear power plant complex, and southern port cities.
State media also reported a strike on a railway bridge in Iran's northeastern Golestan province, and the Revolutionary Guard said two bridges were attacked on the route to Mashhad, where tens of thousands of mourners thronged wide boulevards during a funeral procession for Khamenei on Thursday.
Khamenei ruled Iran for nearly 37 years before being killed in the US and Israeli airstrikes that started the war. He was laid to rest in his hometown of Mashhad early Friday after days of public mourning.
Parliament Speaker Mohammad Bagher Qalibaf, a key negotiator in talks seeking a permanent end to the war, was defiant in a post on X on Thursday morning: "America still hasn't learned that bullying and breaking promises are no longer cost-free. Let me put it plainly: If you strike, you'll get hit."
Iranian Foreign Minister Abbas Araghchi said in a post on Telegram that he spoke by phone with his Saudi, Turkish and Omani counterparts and with Pakistan's army chief, Field Marshal Asim Munir, who has been one of the main mediators in the war. The outreach suggested efforts may be underway to reduce tensions.
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