President Trump said he suspended his plan to strike Iran's power plants, citing what he called progress in negotiations to reopen the Strait of Hormuz.

President Trump said Monday that the United States and Iran were negotiating “a complete and total resolution of our hostilities in the Middle East” and that he would postpone his deadline for attacking Iranian power plants by five days after the two countries traded threats over the weekend.

Iran did not immediately comment. It was unclear what kind of communication might be taking place and who might be mediating; Iran has previously denied seeking a cease-fire. Mr. Trump had threatened on Saturday to bomb Iran’s energy infrastructure within 48 hours unless Iran agreed to open the Strait of Hormuz in the Persian Gulf, a critical shipping route for the global oil trade.