There have been six hostage situations in Northern Irish prisons since the start of 2011, with the latest incident happening in October in Magilligan Prison.
All of the incidents involved a prisoner taking another prisoner hostage.
The figures came to light after TUV Leader Jim Allister posed an Assembly Question to David Ford.
Mr Ford said that there have been eight incidents of hostage taking in prisons in the last five years. Seven incidents occurred in Maghaberry Prison and one in
Magilligan. All of the incidents involved a prisoner taking another prisoner hostage.