Ashtiani's comments came after the United States said last week it was in talks with other countries to set up a task force following a spate of attacks by the Iran-backed Houthis in Yemen on ships in the Red Sea.
"If they make such an irrational move, they will be faced with extraordinary problems," Ashtiani told the official Iranian Student News Agency (ISNA) in comments it published on Thursday.
"Nobody can make a move in a region where we have predominance," he said, referring to the Red Sea.
Ashtiani did not specify what measures Iran was prepared to take in response to the setting up of a US-backed Red Sea task force. READ MORE
