Kili Faqiran, Pakistan ? The boy with the knife looks barely 12. In a high-pitched voice, he denounces the bound, blindfolded man before him as an American spy. Then he hacks off the captive’s head to cries of “God is great!” and hoists it in triumph by the hair.

A video circulating in Pakistan records the grisly death of Ghulam Nabi, a Pakistani militant accused of betraying a top Taliban official who was killed in a December airstrike in Afghanistan.

An Associated Press reporter confirmed Nabi’s identity by visiting his family in Kili Faqiran, their remote village in southwestern Pakistan.

The video, which was obtained by AP Television News in the border city of Peshawar on Tuesday, appears authentic and is unprecedented in jihadist propaganda because of the youth of the executioner.

Captions mention Mullah Dadullah, the Taliban’s current top commander in southern Afghanistan, although he does not appear in the video. The soundtrack features songs praising Taliban supreme leader Mullah Omar and “Sheikh Osama” – an apparent reference to Osama bin Laden, who is suspected of hiding along the Afghan-Pakistan border.

The footage shows Nabi making what is described as a confession, being blindfolded with a checkered scarf.

“He is an American spy. Those who do this kind of thing will get this kind of fate,” says his baby-faced executioner, who is not identified.

A continuous 2 1/2-minute shot then shows the victim lying on his side on a patch of rubble-strewn ground. A man holds Nabi by his beard while the boy, wearing a camouflage military jacket and oversized white sneakers, cuts into the throat. Other men and boys call out “Allahu akbar!” – “God is great!” – as blood spurts from the wound.

The film, overlain with jihadi songs, then shows the boy hacking and slashing at the man’s neck until the head is severed.

A Pashto-language voice-over in the video identifies Nabi and his home village of Kili Faqiran in Baluchistan province, which lies about two hours’ drive from the Afghan border.

A reporter went to the village, and Nabi’s distraught and angry father, Ghulam Sakhi, confirmed his son’s identity from a still picture that AP made from the footage. He said neighbors had told him the video is available at the village bazaar, but he had no wish to see it.

Sakhi said his son had been a loyal Taliban member who fought in Afghanistan and sheltered the hard-line Afghan group’s leaders in the family’s mud-walled compound.

He blames the Taliban and wants to avenge his son’s death.

“The Taliban are not mujahedeen. They are not fighting for the cause of Islam,” the 70-year-old said. “If I got my hands on them I would kill them and even tear their flesh with my own teeth.”

Qari Yousaf Ahmadi, who claims to speak for the Taliban, told AP he had no information about Nabi or the video. None of the group’s commanders he contacted could confirm the execution, he said.