A man has been arrested by gardai investigating the fatal assault of another man in Dublin.
Gardai attended a home in the Gainsborough Lawn area of Malahide where a man, aged in his 60s, was found unresponsive.
He was declared dead at the scene.
A man in his late 20s was arrested in connection with the investigation and detained at a garda station in Dublin.
The office of the State Pathologist has been notified, and a post-mortem examination will be arranged.
The scene is preserved for examination by the Garda Technical Bureau.
A senior investigating officer is leading the inquiry and an incident room has been established at Malahide Garda Station.
A liaison officer has been assigned to support the family of the dead man.
Gardai are appealing for witnesses to come forward, particularly those who were in the area of Gainsborough Lawn, Malahide, Co Dublin, between 8am and 8.45am on Saturday.