An investigation has been launched following the death of a prisoner at Hawke's Bay Regional Prison this week.
Prison manager George Massingham said an inmate was found unresponsive in his cell on Tuesday. "Staff immediately requested medical assistance, however, he was unable to be resuscitated," he said.
"Next of kin have been informed and the matter has been referred to the Coroner. Police have also been advised."
Police have confirmed that the death was not being treated as suspicious.
"I would like to pass on our condolences to the prisoner's friends and family," Mr Massingham said.