The US military says it has hit three Iran-linked oil tankers after ballistic missiles were launched towards two of its warships in the region.
US Central Command (Centcom) said on Saturday it had "permanently disabled" a tanker near Kharg Island and another near the Strait of Hormuz, and "completely destroyed" a third in the Gulf of Oman.
Centcom said it "successfully evaded" multiple attacks from the Islamic Revolutionary Guard Corps (IRGC) targeting a US aircraft carrier and guided-missile destroyer. No American troops were harmed, it said in a statement.
Iranian state media earlier reported that one of its oil tankers had been struck by US missiles off the coast of Kharg Island.
"Let the message to the IRGC be clear: If you shoot at two of our ships, we will impose an even higher economic cost - taking out three of yours," said Admiral Brad Cooper, Centcom's commander.
"We will not hesitate to defend American forces, and if necessary, destroy Iran's limited and exposed oil fleet."
The strikes come nearly a week after renewed attacks between the US and Iran, which followed a month of relative calm between the warring sides.
The US and Israel launched wide-ranging strikes on Iran on 28 February, with Iran responding by attacking Israel, US bases and allied states in the Gulf, and effectively closing the Strait of Hormuz to marine traffic.
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