Iran received information that the United States, with the backing of some regional countries, was preparing to resume actions against Iran, the country's central military command said in a statement on Sunday, according to state media. The military said that any US attack would trigger sustained strikes on US bases and interests in the region, the report added, warning that regional countries supporting US aggression against Iran would be considered parties to the conflict. This came after US President Donald Trump cut short a weekend at Camp David to return unexpectedly to the White House on Saturday. Iranian parliament speaker Mohammad Bagher Ghalibaf said on Sunday that Tehran will not reopen the Strait of Hormuz until its conditions are met and US commitments are implemented.