Iran says it is closing strait of Hormuz over Israeli strikes in Lebanon | 20 June 2026 | Iran has said it is closing the strait of Hormuz after waves of Israeli strikes in Lebanon in a move that threatens to derail the fragile interim peace deal with the U.S., signed just days ago. The Islamic Revolutionary Guard Corps warned ships not to approach the strategic waterway, citing what it called Israeli crimes in Lebanon and a U.S. violation of commitments to establish a ceasefire there. It was unclear if the threat had been carried out, or if it would jeopardise talks in Switzerland scheduled for Sunday that were supposed to start the process of turning the current interim agreement between the U.S. and Iran signed this week into a more detailed deal covering Iran’s nuclear programme. Washington denied that the strait, which Iran is required to keep open under the new deal, has been closed.