The Canadian government will apologise and pay over $10m to one of its own citizens who was held in Guantanamo Bay prison and tortured in detention by the US operatives.

Omar Khadr’s lawyers had argued in the case that “Canada violated international law by not protecting its own citizen and conspiring with the US in its abuse of Khadr”.

The Toronto-born former detainee was 15 years of age when he was shot and captured in Afghanistan in 2002, while the abuses occurred during his US detention in Afghanistan and Guantanamo Bay, the Toronto Star reported.

Khadr’s lawyers met the Department of Justice attorneys behind closed doors last month to reach the deal, the report said.

“Details of the settlement are not yet disclosed, but it is reportedly less than the $20 million sought in the civil suit, but more than $10 million,” the newspaper said

Canadian authorities had a similar settlement with Maher Arar who received a similar amount for his yearlong detention and torture in Syria in 2002.

Lawyers Dennis Edney and John Phillips had argued in the case that has been ongoing since 2004, that “Canada, a world leader for the rights of child soldiers, violated international law by not protecting its own citizen and conspiring with the US in its abuse of Khadr”.

The Pentagon charged Khadr with “murder in violation of the laws of war,” for the death of Delta Force soldier Sergeant Christopher Speer, who was fatally wounded in the July 2002 firefight.

Earlier, Khadr accepted a plea deal in Guantanamo in 2010 in return for being able to come back to Canada.