A post-mortem examination has been completed on the body of a man who was stabbed to death in Cork prison yesterday evening. 

For operational reasons gardaí will not reveal the cause of death however RTÉ News understands the inmate died of a single stab wound to the chest.  

The victim has been named as Graham Johnson, 41, from west Cork.

Mr Johnson died following an incident at around 5pm yesterday after an argument broke out in the kitchen of the prison.

It is believed the row started over a TV remote control.

He had entered prison in November 2011 and was due for release this time next year.

The Bandon native was serving a number of sentences for theft but was described as a model prisoner.

Another inmate in his 30s has been isolated.

Mr Johnson's body was removed to Cork University Hospital last night.

Gardaí have launched a murder investigation and the Prison Service and the Inspector of Prisons are also carrying out their own investigations.

No one has been charged yet in connection with the incident.

A weapon has been recovered at the scene and forensic examinations at the prison by a crime scene examination team from the Cork City Garda Division have been almost completed