UK Daily Mail 
February 18, 2014
A chilling video has emerged showing the merciless execution of 14 men in Syria by a brutal group that are too extreme even for Al Qaeda.
It shows the blindfolded men – some of whom appear to be just teenagers – kneeling in front of a pit at night, illuminated by torchlight.
A man, horrifyingly calm, shoots the first man in the back of the head with a pistol. It is here that the video freezes, the scenes too horrible to show.
Scroll to 3.15 to watch the disturbing footage: