Diversions are in place on the R418
A man in his 20s is in a critical condition following a serious road traffic collision between Athy and Kilcullen last night.
The incident, which occurred shortly after 9:20pm at Fontstown Cross involved a car and motorcyclist.
The motorcyclist was seriously injured and removed from the scene by ambulance to Tallaght University Hospital.
The occupants of the car were unharmed.
A full examination of the crash site is being conducted and diversions are in place.
Gardaí are appealing for witnessess
Anyone with information is asked to contact Athy Station on 059-8634210 or the Garda Confidential Line