U.N. commission includes photos and videos of abuse , victims ' accounts . Panel says actions by ISIS amount to war crimes and crimes against humanity . Comment: ISIS leaders should be held accountable by an international court , paper says .
U.N. commission includes photos and videos of abuse , victims ' accounts . Panel says actions by ISIS amount to war crimes and crimes against humanity . Men have had fingers amputated for smoking , U.N. report says . ISIS leaders should be held accountable by an international court , paper says .