A U.S. fighter jet on Wednesday fired on an Iranian oil tanker in the Gulf of Oman as it tried to breach the U.S. blockade of Iran’s ports, the U.S. military said. The attack occurred as Iran and the U.S. are officially in a ceasefire and as the two countries seemed to be approaching an agreement to end the war. U.S. President Donald Trump threatened Iran with a new wave of bombing if a deal is not reached that includes opening the critical Strait of Hormuz.