"The Daily Mail reported than some of the boys in the video appear to be as young as 5 years old."

"NBC reported that recruits under 15 are being trained to use AK-47s and are given dolls to teach them how to behead people.

"Then they make them watch a beheading, and sometimes they force them to carry the heads in order to cast the fear away from their hearts," an Iraqi security official told NBC."