article_snippet: Scroll down for video .
article_snippet: One of the most shocking thing was how organised the attacks have been,' Nagra told reporters.
article_snippet: But then IS fighters received orders via telephone, and suddenly the men and older boys were being marched off to be executed. '
article_snippet: According to witness and victim testimony, foreign fighters from at least 10 countries, including a couple of westerners, had taken part in the attacks, as had some people from neighbouring villages.
article_snippet: IS fighters attacked the Badoush prison that month, dividing the 3,000 inmates into groups, freeing the Sunnis and loading the remaining 600 mainly Shia inmates onto trucks, before driving mainly Shia inmates onto trucks to a ravine and shooting mainly Shia inmates onto trucks.
article_snippet: One witness had described how to 1,700 cadets were either shot or beheaded, and said One witness had seen several IS fighters 'kicking heads around like footballs,' Nagra said.
highlights_snippet: 1,700 army cadets shot or beheaded with jihadis kicking heads as footballs .
  
highlights_snippet: Report based on witness accounts of more than 100 survivors .