Three men are still being questioned today over the fatal shooting of a man in Tallaght on Friday night.
The killing of 27-year-old Shay O'Byrne has been linked to a feud between rival drug gangs in the Crumlin and Drimnagh suburbs of Dublin. A 26-year-old woman was shot in the leg during the attack.
A Garda spokesman said the three arrests were made late on Friday night in the Crumlin area. One man is in his late teens, while the other two are in their mid 20s.
The shooting in the Tymon estate in Tallaght, west Dublin, is the 11th murder in the Crumlin-Drimnagh feud since 2000, and the eighth gangland murder in Dublin so far this year.
Mr O'Byrne and his partner were sitting in a parked car outside a house at Tymon North Park just before 8.30pm when a gunman got out of another car, approached their vehicle and opened fire with a handgun. It is believe that the man was shot in the back as he ran away from the gunman.
The woman is believed to have struggled with the gunman during the incident. Gardaí are investigating whether the couple was waiting to meet somebody. A gun was found at the scene.
Detectives are looking for two suspects and two cars. The gunman was seen running from the scene on Tymon North Park into Tymon North Gardens where he got into a car and was driven away.
This car was a silver coloured Nissan Primera with a partial registration number of 00D. It was seen in nearby Castlelawn Estate a short time later. Another car, a sky blue Volkswagen Passat, with a partial registration number of 06WW was also seen in Tymon North Gardens at the time of the shooting.
The gunman is believed to be 25 to 30 years of age, about five foot nine inches tall with dark hair. He was dressed in black and had a hood. The other man is believed to be in his mid to late 30s, of similar height with a strong build and dark short hair.