Story highlights Boy shoots two kneeling men in back of head in new propaganda ISIS video

The boy has been identified as Abdullah in prior videos

Human Rights Watch says extremists in Syria have been using child soldiers as young as 15

(CNN) A boy with a pistol appears to execute two men who are accused of being Russian spies in a new propaganda video released by the terror ISIS group.

In the video, the boy, who has been identified as Abdullah in prior ISIS videos, sports long hair and wears a black sweater and military fatigue pants.

He stands behind the two men, who are kneeling, and shoots them in the back of the head in a theatrically produced video with slow motion. The boy stands over one of the bodies, fires two more times, and later raises his pistol high.

CNN cannot verify the authenticity of the video, but it appears to be the first time ISIS has shown a child carrying out an execution.

The video's title is "Uncovering an Enemy Within" and states that "enemies thought that they could dispatch spies and agents to plot against the Islamic State, but Allah disgraced their efforts and thwarted their plans."