A man in his 80s has died in an alleged attack at Mercy University Hospital in Cork.
Gardaí were alerted to the incident involving two patients shortly after 5.30am on Sunday morning.
Gardaí say they're investigating all of the circumstances surrounding the death of a man in his late 80s.
A man in his 30s was arrested at the scene of the incident, and has been taken to Bridewell Garda Station in Cork.
The scene is currently preserved for a technical examination, and the services of the State Pathologist have been requested.
The family of the deceased has been notified and a Garda Family Liason Officer appointed.
Gardaí say they are not currently seeking anyone else in relation to the incident.