Pentagon says death toll number is probably accurate . The U.S. military has been conducting airstrikes against ISIS in Iraq and Syria since August 2014. Some of those killed were women and children , tribal leader claims . U.S. says killings are further proof Iraqis must work with coalition to defeat ISIS .
Pentagon says death toll number is probably accurate . Iraq government puts death toll from ISIS executions at 322 from one Sunni tribe . Some of those killed were women and children , tribal leader claims . U.S. says killings are further proof Iraqis must work with coalition to defeat ISIS .