Signs indicating planned U.S.-Iran peace talks are displayed at the Burgenstock Resort in Obbuergen, near Lucerne, in Switzerland, Friday. Anas Mallick via AP-Yonhap

TYRE, Lebanon — Iran on Saturday said it had closed the Strait of Hormuz because of Israel’s continued attacks on Lebanon and warned that while negotiators were going to Switzerland for talks with the United States on their interim agreement, not much likely will happen if the fighting doesn’t stop.

Key mediator Pakistan said technical-level talks will begin Sunday in Switzerland, with Qatari mediators also participating.

Iran’s joint military command said the strait was closed because of the U.S. “clear breach of its commitments” by failing to end the war. The interim deal is meant to stop fighting on all fronts.

Shortly after that, the state broadcaster said Iran’s negotiating team was leaving for Switzerland, a trip originally planned for Friday. State media said the team includes parliamentary Speaker Mohammad Bagher Qalibaf, Foreign Minister Abbas Araghchi and central bank and oil officials, among others.