Gardai are investigating the death of a man at a house in Castleknock overnight.
The body of a man believed to be in his 30s was found at a house on Beech Park Avenue shortly before 2 o'clock this morning.
He was pronounced dead at the scene, and a 34 year old man who was at the house was arrested.
He's being questioned in Blanchardstown Garda Station.
The scene remains sealed off for a full technical examination, and the State Pathologist has been notified.
