The official inquiry into the murder of Loyalist terrorist Billy Wright in the Maze Prison has found that there was no "state collusion" in his killing, Northern Ireland Secretary Owen Paterson said.
But Mr Paterson told the Commons that there had been "serious failings" within the prison which "facilitated" Wright's death in December 1997, although these were due to "negligence" and were not intentional.
"His murder in a high security prison should never have happened. It was wrong and I am sincerely sorry that failings in the system facilitated his murder," Mr Paterson said.
The inquiry report said a review of the Northern Ireland prison service similar to Lord Patten's police overhaul should be launched.