A man in his 70s has died following an incident at a house in Waterford city on Friday afternoon.
He has been named locally as Pat Fitzgerald.
Gardaí and emergency services responded to the incident in St Catherine's Grange shortly after 2pm.
Mr Fitzgerald was found at the scene with injuries and in an unresponsive condition.
He was brought to University Hospital Waterford where he was pronounced dead on Sunday.
A man in his 30s was arrested at the scene and detained at a garda station in the Waterford-Kilkenny Divison.
He was later charged in connection with the incident and appeared before Waterford District Court.
The local coroner and the State Pathologist have been notified and a post-mortem examination will be carried out.
A Senior Investigating Officer is leading the investigation and a Family Liaison Officer is providing support to Mr Fitzgerald's family.
An incident room has been established at Waterford Garda Station.
Gardaí are appealing for witnesses to contact Waterford Garda Station 051 305 300 or the Garda Confidential Line 1800 666 111.
Investigations are ongoing.
