Mt Eden Corrections Facility. Photo: RNZ
A homicide investigation has been launched following the death of an inmate at Mt Eden Corrections Facility on Friday morning.
Police were called to a "sudden death" incident at the Lauder Road address just before 10am.
The man was located decreased in his cell at the facility with numerous injuries.
Police are speaking with a man in connection with the death.
The prisoner was in a double-bunked cell, and the second prisoner who was residing in the cell has been secured in a single-cell while these investigations are ongoing, the Department of Corrections said.
The death has been referred to the coroner, and a post-mortem examination will likely take place tomorrow.
Police, the Department of Corrections and the independent Corrections Inspectorate will be carrying out a full investigation.
St John declined to comment.