Investigations are underway after a prisoner died in custody at Maghaberry.
The Prison Service said the 57-year-old man passed away on Thursday morning. His next of kin have been informed.
As with standard procedure, the PSNI, Coroner and Prisoner Ombudsman have launched investigations into the death.
Ronnie Armour, Head of the Northern Ireland Prison Service, said: "I would like to extend my sympathy and that of the Northern Ireland Prison Service to the family of the prisoner.
“My thoughts are with them at this difficult time."