The first-ever video footage recorded inside the Guantanamo Bay prison was released Tuesday. The lawyers of a Canadian prisoner released hours of a questioning session of an enemy combatant at the remote United States prison in Cuba.

The man questioned in the video footage is Omar Khadr and the interrogation happened in 2003. The footage was reportedly filmed through an air duct.

The video shows clearly enough a Canadian Security Intelligence Services agent interrogating Khadr about the circumstances of his capture and arrest as an enemy combatant. The teenage Canadian citizen stands accused of throwing a grenade that killed a U.S. soldier during a 2002 firefight in Afghanistan. Khadr was 15 back then.

In the footage shot secretly through a ventilation shaft, Khadr is seen in a distressed state and complaining about the fact that he has been tortured. He can be seen holding his face in his hands, pulling at his hair and repeatedly chanting:

"Help me."

In the interrogation room, Khadr is accompanied by a foreign ministry official and agents from the Canadian Security Intelligence Service (CSIS). In the footage he can be seen complaining to the ministry official that he had been tortured during his stay at the US military detention centre at Bagram air base in Afghanistan. At one point, the detainee raises his orange shirt to show his torture-inflicted wounds.

"You don't care about me," he tells interrogators.

Khadr is the only Westerner detainee at Guantanamo Bay. He was captured when he was 15 by US forces after he participated at a fire exchange at a suspected al-Qaeda camp in Afghanistan.

"I hope Canadians will be outraged to see the callous and disgraceful treatment of a Canadian youth," Dennis Edney, one of Mr Khadr's lawyers, told the Toronto Star.