Queensland Corrective Services can confirm that a prisoner died overnight at Maryborough Correctional Centre.
The 74-year-old man was found deceased in his single occupancy cell at about 4:30am.
Officers and QAS made attempts to resuscitate the man, however he was declared dead at about 5:20am.
QCS will assist Queensland Police in preparing a report for the Coroner.
Our thanks go to the responding officers, who are being provided assistance and support.