A man, also in his 20s, has been arrested.
A man in his 20s has been stabbed to death on the Northside of Dublin.
The incident happened at around 7:15am this morning at a house on St Lawrence Road in Clontarf.
The victim was pronounced dead at the scene.
Gardai have arrested a man in his 20s and he is being held at Clontarf Garda Station.
The scene has been preserved for a technical examination.
Garda are appealing for anyone with information to come forward.
