A man in his 40s has died after he was struck by a vehicle in Dundalk, County Louth, gardaí (Irish police) have said.
The collision happened at about 02:45 local time at Junction 16 on the southbound M1 motorway, on Sunday.
Ambulance personnel attended to a male driver in his 50s and his three passengers for non-life threatening injuries.
The man’s body remains at the scene and a post-mortem examination will take place in due course.
The road remains closed and local diversions are in place.
It was one of three fatal road accidents across Ireland overnight.
At Skrine Hill in County Roscommon a man in his 20s died when the car he was driving overturned.
And in County Kerry a pedestrian was killed while walking at Duagh Village outside Listowel.
A driver and three passengers were uninjured.
Gardaí have appealed for anyone with information or dashcam footage from the collisions to contact them.