The Strait of Hormuz has been a flashpoint since the US-Iran war started more than two months ago after the US struck several key Iranian sites and Iran retaliated

President Donald Trump said the US Navy will start preventing ships from passing through the Strait of Hormuz, after US-Iran peace talks ended without agreement.

Iranian foreign ministry spokesman Esmaeil Baghaei said Iran is still looking over a proposal from the U.S. regarding an end to the war, adding that Tehran will not respond to “deadlines or ultimatums" and that those "mean nothing.

The U.S. conducted strikes against at least two locations in Iran on Thursday, a U.S. official said. The strikes in Bandar Abbas and Qeshm Island were defensive, the official said, and do not constitute a resumption of major combat operations against Iran.

US naval forces and Iranian forces exchanged fire in the Strait of Hormuz. President Donald Trump confirmed three American destroyers passed through the waterway under attack. Iran's IRGC claimed to have targeted US vessels after the US Navy fired on an Iranian oil tanker.

US Secretary of State Marco Rubio said Operation Epic Fury — launched in February against Iran — has ended, and the US is focused on a new operation to guide ships through the Strait of Hormuz. Follow for live news updates.

It also called on the U.S. to end its naval blockade, guarantee no further attacks, lift sanctions and end a U.S. ban on Iranian oil sales, the semi-official Tasnim news agency said. Within hours, Trump dismissed Iran's proposal with a post on social media.