Iran has seized a second British-linked tanker in the Persian Gulf.
The Liberian-flagged, UK-owned MV Mesdar was seen on a tracking service to have slowed before turning sharply toward Iran.
Jeremy Hunt, the foreign secretary, confirmed the seizure. In a statement, he said he was “extremely concerned” and would convene a Cobra meeting.
He added: “Their crews comprise a range of nationalities, but we understand there are no British citizens on board either ship.