Gardai at Blanchardstown are investigating a fatal stabbing which occurred at Fortlawn Avenue, Blanchardstown shortly after 1.30am this morning 19th June 2012.
The victim in his early 20's, was taken to Connolly Hospital by ambulance, and was pronounced dead a short time later.
The scene is preserved pending forensic examination by Garda Crime Scene Investigators.
One male in his early 20s, were arrested close to the scene and taken to the Blanchardstown Garda Station, where he is detained under Section 4 of Criminal Justice Act 1984.
Gardaí are appealing for any witnesses to the incident or anyone who may have information to contact them at Blanchardstown Garda Station on 01 - 6667000, the Garda Confidential Line 1 800 666 111 or any Garda Station.