Worshippers in Tehran held rallies to condemn assassination of Major General Qassem Soleimani, the commander of the IRGC Quds Force . General Soleimani and Abu Mahdi al-Muhandis, the second-in-command of Iraq's Popular Mobilization Units (PMU), were martyred in the U.S. airstrikes on Baghdad's international airport on Friday morning. Iran has vowed "tough revenge" for Soleimani's death.