The video that emerged on social media showed a visibly frightened boy lying in the back of a truck alongside what appeared to be several rebel fighters.
The rebels claimed the boy was a prisoner from Liwa al-Quds -- a pro-regime militia force made up mostly of Palestinians in Syria -- and that he was captured from an unofficial refugee camp north of war-torn Aleppo.
The footage then shows one of the men taking a knife to the child's head. The boy appears to be quite young, perhaps around 10, though CNN cannot verify his age or identity.
