The incident took place on Friday afternoon.
Gardaí in Kildare are appealing for witnesses following a fatal collision on the R445 near Monasterevin.
They were called to the scene at approximately 2.30pm on Friday afternoon.
A man aged in his 50s was fatally injured when his motorcycle collided with a 4×4 vehicle.
He was taken by ambulance to Naas General Hospital where he was pronounced dead.
The driver and sole occupant of the 4×4, a man in his 60s, was also taken by ambulance to Naas Hospital, but his condition was not known at the time of writing.
The R445 is currently closed to traffic west of Monasterevin to facilitate Garda forensic collision investigators and local diversions are in place. The local Coroner will be notified.
Gardaí are appealing for witnesses to contact Kildare Garda Station on 045-527730 or the Garda Confidential Line 1800 666 111.
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