Iran's central military command announced on Saturday it would resume "strict management" of the Strait of Hormuz, reversing a decision to unblock the strategic channel as part of negotiations with Washington.
In a statement shared on state television, the headquarters said Washington had broken a promise by continuing its naval blockade of ships sailing to and from Iran's ports.
Until the United States restores freedom of movement for all vessels visiting Iran, "the situation in the Strait of Hormuz will remain strictly controlled," the statement said.
The announcement came after US President Donald Trump said the blockade of the Strait will remain and attacks will resume if no agreement is reached with Iran.