Carlow gardaí are investigating a fatal single vehicle collision in Bagenalstown.
It happened at Dunleckney at around 9.00am on Sunday.
A male driver (33) was seriously injured when the car he was driving collided with a wall.
He was taken to St Luke's Hospital in Kilkenny and later transferred to St James Hospital in Dublin - where he died on Sunday night.
Gardaí are appealing to any persons or motorists who may have witnessed the collision to contact them at Carlow garda station on 059-913-6620, the Garda Confidential Line at 18000-666-111 or any garda station.