US and Iranian forces exchanged heavy missile and drone strikes with ‌Tehran targeting US facilities in states across the Gulf on Sunday after saying it had again closed the vital Strait of Hormuz.A series of attacks between the US and Iran over the past several days led president Donald Trump ​to declare the end of a ceasefire meant to halt the fighting that the US and Israel began on February 28, though Trump has left the door open to continued negotiations.The escalation followed several attacks on commercial ships in the area. Iran said it had closed the strait after firing a warning shot that struck a vessel travelling on an unapproved route, and said on Sunday it had disabled a second vessel.The strait will remain closed ​until “the end of US interference in this region,” Iran’s Revolutionary Guards said. US Central Command, however, said commercial vessels continue to transit through the waterway that carried one-fifth of the world’s oil and LNG shipments before the war.Central Command said US forces hit 140 Iranian military targets on Saturday, out of more than 300 during three nights of strikes “to degrade Iran’s ability to ‌attack ‌civilian ​mariners and commercial vessels freely transiting the strait.”Iranian state media reported explosions in a number of port cities.In response, the guards said they had destroyed a command and control center and drone hangars at US ally Jordan, targeted a US radar site in Kuwait, attacked US aircraft carrier support ⁠and refuelling platforms in Oman and destroyed a jet maintenance centre and command ​facility in Qatar.Qatar’s government said three people, including a child, had been injured by falling ​shrapnel from the attack.The United Arab Emirates said its defence systems engaged missiles and drones from Iran, while warning sirens sounded in Bahrain and explosions were heard in Doha.Tehran’s strikes marked a ‌sharp escalation in pace and targets, after it had warned that any ​retaliation over the container ship incident would be met with a “severe response.”Tankers in the Strait of Hormuz. Photograph: AP [ Lindsey Graham, key ally of Donald Trump, dies after sudden illness, his office saysOpens in new window ]In recent weeks, Iran had hit Kuwait and Bahrain while avoiding Qatar since early April and the UAE ⁠since early May.Sunday’s attack on Qatar targeted a state whose mediation efforts have ⁠been central to attempts to broker a ​ceasefire between the US and Iran – and Doha has previously said it would not act as a mediator so long as it was under attack.The war has destabilised the Gulf, while Iran’s effective blockade of the strait has caused energy prices to surge, fuelling global inflation.Higher prices, especially for gasoline, are politically sensitive for Trump ahead of November congressional elections.Iran’s Foreign Minister Abbas Araqchi has accused the United States of violating the ceasefire agreement. “There can only be mutual compliance,” he wrote on X on Friday.On Sunday, Iran’s top negotiator Mohammad Baqer Qalibaf posted on X: “The era of one-sided deals is over. We told you: keep your word or pay the price. Reality is knocking.”The US revoked the license authorising the sale of Iranian crude on Tuesday after Qatari and Saudi commercial tankers came under fire earlier ‌in the week, prompting a series of tit-for-tat ⁠US and Iranian strikes.While Iran has not claimed responsibility for the earlier ship attacks, analysts say Tehran uses such actions to gain leverage in negotiations.Araqchi and Omani Foreign Minister Badr Albusaidi met in Oman to exchange “views on appropriate mechanisms for the safe passage of ships through the Strait of Hormuz,” according to a statement ‌from Iran. Oman’s state news agency said negotiators would continue talks “at the technical and political levels.”A written statement from Iran’s new supreme leader, Ayatollah Mojtaba Khamenei, on Saturday threatened vengeance for the death of his predecessor and father, who ​was killed in the war’s initial attacks.“We pledge to avenge the blood of the martyred leader and all the martyrs,” the ​message said.Iran’s new leader has not been seen in public since the war began. – Reuters [ Iranian minister arrives in Oman for talks as US seeks pledge on Strait of HormuzOpens in new window ]