Gardaí are investigating a fatal road traffic collision that occurred on the N7 at Rathcoole last night.
The collision occurred when a car travelling on the wrong side of the road collided with a truck at approximately 11.40pm.
The three male occupants of the car all died.
The driver of the truck has been taken to Tallaght University Hospital to receive treatment for serious injuries.
The scene remains closed this morning to allow for forensic collision investigators to conduct an examination. Diversions are in place.
Gardaí are appealing for anyone with information to contact them at Clondalkin Garda station on 01 6667600 or the Garda Confidential Line on 1800 666 111.