A second man has been arrested in connection with the fatal shooting of Christopher Warren.
Mr. Warren died after he was dropped off outside St. James' Hospital in Dublin with gunshot wounds on Friday evening.
The man - who is in his late 20s - was arrested this morning in the Dublin 8 area and is being held at Mountjoy Garda Station.
Another man in his late 20s who was arrested on Saturday was released this morning without charge.
A file will be prepared for the DPP.