An Aboriginal man has died in custody at Casuarina prison in Western Australia.
In a statement released on Wednesday night, officials said the 46-year-old man was found unresponsive in his cell overnight.
Officials said prison officers and medical staff provided first aid to the man before St John Ambulance paramedics arrived.
The man was declared deceased at the scene.
The state's Department of Justice Corrective Services said preliminary reports indicate there were no suspicious circumstances.
WA Police are investigating and as is mandatory for all deaths in custody a report will be prepared for the State Coroner.
