Eight of the suspects were said to have died on Wednesday, same day the army released to the Borno state government some of the detainees whom it said had been cleared of involvement in insurgency.
The International Committee of the Red Cross, ICRC, has called on the Nigerian military authorities to deal humanely with the suspects who were being detained for alleged links with the Boko Haram terrorist group.
The Nigerian army on Sunday announced the release from detention of 249 suspected Boko Haram members after they were investigated and cleared by the Joint Interrogation unit in Borno State.