But a spokeswoman from the International Committee of the Red Cross (ICRC) said that all the photos had been given to the detainee's family before they started appearing on the Internet.
"These photos are taken to be transmitted to family members, in the same spirit as the Red Cross messages" from prisoners, she explained.
Sources said that the photos show a strikingly different Mohammed from an image distributed after his detention in 2003. The Guantanamo 'war on terror' prison camp detainee looks calm, with a half-smile and with a considerable beard.
The new pictures were published early Sep 2003 on Islamist internet websites and quickly circulated.