A man is in custody this morning in connection with the death of 63-year-old man who was stabbed in the South of the city last night.
It happened in a house at Rutland Grove in Crumlin shortly after 8 pm last night.
He was removed by ambulance to St James's Hospital, where he was pronounced dead a short time later.
Gardaí and emergency services were called to the scene, which has been preserved for a technical and forensic exam.
The man in his 30s is being held at Crumlin Garda Station.
An incident room has been set up at Sundrive Road Garda Station.