Gardai are appealing for witnesses to a road traffic collision which occurred at approximately 11am on Saturday morning on the Trim Road at Balreask Cross in Co Meath.
The collision involved a motorcycle and a car.
The motorcyclist was subsequently taken to Connolly hospital in Blanchardstown with serious injuries.
Meanwhile, Gardaí would like to speak to anybody who may have been travelling in the area at the time and who have dash cam footage.
Information can be provided to Navan Garda Station on 046-9036100.