FILE - Blindfolded men are led to a bus after being detained during fighting between Iraqi security forces and Islamic State militants during a military operation to regain control of Fallujah, 40 miles (65 kilometers) west of Baghdad, Iraq, Wednesday, June 1, 2016. Since the operation began, the United Nations says they have received reports that some 500 men and boys have been detained for questioning as thousands of civilians have fled the city???s mostly rural outskirts.(AP Photo/Anmar Khalil, File)