The United States on Tuesday carried out a strike in Iraq in self-defence, US officials told Reuters, as regional tensions rose after an Israeli airstrike in Beirut that Israel claims killed Hezbollah’s most senior commander. Iraqi police and medical sources said the strike inside a base south of Baghdad used by Iraq’s Popular Mobilisation Forces (PMF) killed four members of the group, which contains several Iran-aligned armed militias, and wounded four others. In a statement after the blasts, the Popular Mobilisation Forces did not accuse who was responsible. US officials, speaking on conditi…