A man arrested in connection with the death of Dan O'Reilly in Tallaght yesterday has been released without charge.
A file will be prepared for the Director of Public Prosecutions.
Mr O’Reilly, who was in his 50s, was pronounced dead in hospital after a number of incidents at a housing estate in the Tymon North area.
Gardaí say they received reports of shots being fired at a house in the area shortly before midnight on Sunday.
No injuries were reported, but following another incident outside the house, the man was hit by a van.
Gardaí in Tallaght are continuing to appeal for any witnesses to the incidents to come forward.
Investigators are particularly interested in a dark-coloured hatchback car that was seen leaving the area around the time.
Gardaí are also appealing for any road users who may have camera footage, including dashcam videos, who were in the area late on Sunday night, or in the early hours of Monday, to make it available to them.