Gardaí have arrested a man in connection with the death of a 60-year-old man in Kilmainham earlier this week.
The man, who is in his late 30s, is being detained at Kilmainham Garda Station under Section 4 of the Criminal Justice Act 1984.
The body of Denis Brennan was found on Tuesday morning in his apartment at BowBridge, Kilmainham, Dublin 8.
The alarm was raised on Monday after the father of three failed to make contact with friends.
There were no signs of a break-in at the apartment.