The U.S. had launched strikes earlier in the day, and Iran retaliated by attacking American allies in the region.
A fifth of the world’s oil and gas passed through the strait before Iran asserted control over it after the start of the war.
The United States and Iran each say they control the Strait of Hormuz after attacks over the weekend stretching across the wider Middle East.
Iranian state media reported explosions, including in the port city of Bandar Abbas on the strait and in Sirik, another southern coastal city.
The U.S. agreement to immediately allow Iran to sell its oil freely and the offer to eventually lift all sanctions.
The U.S and Iran have traded strikes for a second day, pushing the Middle East closer to the resumption of a full-scale war.
The crash occurred with the Middle East still reeling after Iran and Israel exchanged fire the previous day.
The U.S. military said Iran fired missiles at Kuwait, which fell apart en route, and downed drones targeting American forces.
The deal would extend the ceasefire by 60 days and reopen the Strait of Hormuz as new talks are held on Iran’s disputed nuclear program.
U.S. Secretary of State Marco Rubio said Friday there was “slight progress” during talks with Iran amid uncertainty about whether a deal will …