Washington/Dubai: The US military began launching more strikes against Iran on Monday, after a weekend in which they exchanged heavy missile and drone assaults.

The latest US attack started about 7am on Monday (AEST), US Central Command said in a statement on social media platform X, “to continue degrading [Iran’s] ability to attack civilian mariners and commercial ships freely transiting the Strait of Hormuz”.

US Central Command spokesperson Tim Hawkins told CNN that U.S. aircraft shot down an Iranian cruise missile and a one-way attack drone.

US and Iranian forces spent the weekend launching heavy missile and drone assaults, with Tehran targeting US facilities in states across the Gulf on Sunday and saying it had again closed the vital Strait of Hormuz.

The strikes were the latest in a cycle of attacks and counter-attacks as Iran seeks to assert control over shipping through the strait. However, the barrage marked an escalation in pace and range.

Iran’s weekend strikes extended to Qatar, a mediator in ceasefire talks that had not come under attack since April, while the United Arab Emirates, which had not been targeted since early May, said its air defences had engaged missiles and drones from Iran.

In a brief phone interview with Reuters on Sunday afternoon, US President Donald Trump referred to the weekend’s US strikes on Iran. “We’re beating them up,” he said.

Iranian media said on Sunday there had been missile attacks and explosions around the port cities of Sirik and Bandar Abbas, home to military facilities on the strait, and nearby Qeshm Island.

In a statement, Iran’s foreign ministry condemned “aggressive” US attacks against Iran over the weekend. The ministry also said talks between Iran and Oman on Saturday in Muscat – focused on arrangements for managing the strait and transit routes – were unable to reach a result because of “overt and covert” U.S. pressure on Oman.

In the past week, Trump has said he considers the ceasefire over, while leaving the door open to more talks.

Iran’s top negotiator, Mohammad Bagher Ghalibaf, posted on X on Sunday: “The era of one-sided deals is OVER. We told you: keep your word or pay the price. Reality is knocking.”

The war that the US and Israel launched against Iran on February 28 has destabilised the Gulf, where Iran has struck countries hosting US bases. Iran’s effective blockade of the strait has driven energy prices higher, fuelling global inflation.

Higher prices, especially for gasoline, are politically sensitive for Trump ahead of November’s congressional elections.

Iran has sought to establish a permanent system for collecting fees in the strait, which carried one-fifth of the world’s oil and liquefied natural gas shipments before the war, and has warned vessels not to sail without its authorisation.

It said late on Saturday it had closed the waterway after firing a warning shot that struck a vessel travelling on an unauthorised route. On Sunday, it said it had disabled a second vessel.

India said one of its nationals was missing after an attack on the container ship GFS Galaxy off the coast of Oman. Oman said 23 crew members had been rescued. Qatar advised all vessels, including leisure boats, fishing boats and jet skis, to suspend activities

Iran’s recently created Persian Gulf Strait Authority said on Sunday that passage through the strait was not currently possible due to “recent illegal movements of the United States military forces in the region”. Permits would be issued “as soon as stability and calm are restored”, it said.

The US, which revoked the licence authorising the sale of Iranian crude on Tuesday following earlier attacks on shipping, said its forces were positioned to safeguard freedom of navigation despite what it described as “aggression, harassment, threats, and arbitrary declarations” from Iran.

“Iran does not control the strait. Traffic is flowing,” the US said.

The US Navy-led Joint Maritime Information Centre reiterated guidance that, despite a severe security threat, an “expanded” southern route near Oman was available for two-way traffic.

On Saturday, US Central Command said American forces had hit 140 Iranian military targets, and that more than 300 had been struck over three nights in the past week “to degrade Iran’s ability to attack civilian mariners and commercial vessels freely transiting the strait”.

Iranian state media reported explosions in several port cities and said an Iranian army officer was killed.

In response to the US attacks, Iran’s Revolutionary Guards said they had destroyed a command-and-control centre and drone hangars in Jordan, a US ally, and targeted an American radar site and rocket launcher systems in Kuwait, attacked US aircraft carrier support and refuelling platforms in Oman and destroyed a jet maintenance centre and command facility in Qatar.

Qatar, which has previously said it would not act as a mediator so long as it was under attack, said three people, including a child, had been injured by falling shrapnel. It said Iran was “fully legally responsible” for the attack.