According to first reports, gunmen hiding behind the saluting stand shot up an Iranian military parade on Saturday in the southern city of Ahvaz. Several people were killed and injured. The parade marked the anniversary of the 1980-88 Iran-Iraq war. In Tehran, President Hassan Rouhani said in a televised speech: “President Donald Trump will fail in his confrontation with Iran, just like Iraq’s Saddam Hussein.” DEBKAfile: Ahvaz is largely populated by Sunni Muslim Arabs, who are the main workforce of Iran’s southern oilfields. Tehran often accuses Saudi Arabia and the UAE of stirring up anti-regime unrest in Ahvaz. The attack on the military parade is a serious assault on the Shiite regime and will further notch up friction with Riyadh and Abu Dhabi.