The first video of a terror suspect being interrogated at Guantanamo Bay has been released by his lawyer.

Obtained under Freedom of Information laws, the video shows Canadian prisoner Omar Khadr, who was just 16 when captured in Afghanistan in July 2002, being questioned.

Documents released last week indicated that Khadr, now 21, was deprived of uninterrupted sleep at Guantanamo before an interview by investigators from Canada.

He is the last Westerner still being held at the naval base and is due to go on trial in October on five war crimes charges, including the murder of a US soldier in a grenade attack during the 2002 firefight.

The interrogations took place over four days from February 13, 2003, at the US naval base following his transfer from detention in Afghanistan the previous October.

In the video, Khadr is seen pulling at his hair, covering his face and shedding his orange prison suit. He is also seen crying on several occasions. He also removes his tunic, saying it was to show wounds on his back and shoulder after the Afghan firefight.

Khadr's Pentagon-assigned military lawyer may use the video tapes as part of the Canadian's defence.

Meanwhile, a newly-released document suggests Osama bin Laden's former driver, Salim Hamdan, may have been subjected to 50 days of sleep deprivation while kept at the Cuban detention camp, the prisoner's defence lawyers have said.

The trial of the Yemeni, who is charged with conspiracy and providing material support to terrorists, is scheduled to start in a week and will be the first at the tribunals. He faces life in prison if convicted.

One of Hamdan's lawyers, Joseph McMillan, said: "My view personally is that sleep deprivation of that nature extending for 50 days would constitute torture."

Hamdan's lawyers claim he was beaten in Afghanistan and subjected to "more sophisticated" abuse at Guantanamo including sexual humiliation, isolation, intimidation and deception.

His defence intends to call eight prisoners, including September 11 mastermind Khalid Sheikh Mohammed and three other alleged 9/11 plotters, Walid bin Attash, Ramzi Binalshibh and Mustafa al Hawsawi.

They say Mohammed and bin Attash have evidence to exonerate Hamdan.

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