Adult ISIS Fighter in Child Executioner Video Killed, Official Says

Man watched as young boy appeared to murder two men in chilling video.

Abu Saad al-Dagestani was the nom de guerre of an ISIS terrorist shown in the gruesome Jan. 13 tape overseeing what ISIS claimed was the execution of two alleged "Russian spies" by a boy under 11. Al-Dagestani was first reported killed in jihadi tweets on Jan. 15, which claimed he was "martyred" near the embattled Kurdish town of Kobani on Syria's border with Turkey.

"We do think he was killed," a counter-terrorism official familiar with military operations around Kobani by the U.S.-led coalition told ABC News today.

The video, apparently produced by an ISIS media outlet and shared on Twitter, was seven minutes long and featured “confessions” by the two men. In a heavily-edited section, the boy, called a “lion’s cub,” was shown firing a pistol at the heads of the men, who each fall, apparently lifeless.

Officials declined to comment on the video's authenticity, but military sources and others said they suspected the executions were staged, noting the absence of bullet impacts and blood splatter. Another former counter-terrorism official, however, previously told ABC News the murders looks fairly real to him.

ISIS is well known for its sophisticated disinformation program, which is part of a highly-sophisticated media messaging committee that specializes in shocking western audiences with cinematic scenes of mass-decapitations and executions.