Lawyers for a Canadian prisoner held at Guantanamo Bay have released a videotape showing him being interrogated.

The pictures offer the first glimpse inside the secretive and isolated US prison in Cuba.

In the video, a Canadian Security Intelligence Services agent is shown grilling Omar Khadr in 2003, when he was 15.

The video shows him weeping, his face buried in his hands.

Khadr also tells his captors he's been tortured.

The Canadian citizen is accused of throwing a grenade that killed a US soldier during a 2002 firefight in Afghanistan.

Al Jazeera's Dan Nolan tells the story.