The Levant News — Iraqi authorities have arrested “a number” of Shiite militiamen accused of murdering dozens of Sunnis in the offensive to take back Fallujah from the Islamic State (IS). Iraq is investigating allegations that the majority Shiite Popular Mobilization Forces, which fought alongside Iraqi army forces in the fight for Fallujah, executed 49 Sunni men who surrendered to them, according to government spokesman Saad al-Hadithi. According to the governor of Anbar, 643 men went missing between June 3 and June 5. “All surviving detainees were subjected to severe and collective torture by various means,” he said. The participation of the Popular Mobilization Forces has raised fears inside Iraq that the country seems to be battling IS and Shiite infighting at the same time.