Iran’s Revolutionary Guards attack Israel’s spy headquarters in Iraq’s Kurdistan region and strike in Syria against the Islamic State. The conflict escalates with Iran’s allies entering the fray. Lebanon’s Iran-backed Hezbollah suffers casualties. The Guards vow to avenge their fallen comrades. The attack on Erbil, Kurdistan, is condemned. Civilians, including a prominent Kurdish businessman, are killed. Air traffic at Erbil airport is halted. Iran accuses the US of supporting Israeli crimes in Gaza.