Five people have died and another has been seriously injured in road traffic incidents since Friday night.
A 50-year-old male cyclist was fatally injured in Co Clare on Sunday morning in a collision with a camper van.
The incident occurred at 11.45am on the N18 Limerick to Galway Road near Bunratty.
Meanwhile, an 18-year-old woman who was seriously injured in a collision between a 4x4 and a truck on Friday evening about 2km outside Abbeyfeale in Co Limerick died in hospital on Saturday night.
A 19-year-old man who was travelling with her in the 4x4 died at the scene.
Gardaí at Newcastle West have appealed for witnesses to the incident.
Cork crash
Separately, a 21-year-old man died when his car struck a ditch and then a pole on the Boherbue-Kiskeam road in north Cork in the early hours of Sunday morning.
The man, named locally as Denis Collins, from Chapel View in Kiskeam, was pronounced dead at the scene.
In Co Mayo, a man in his 30s died after his car left the road and hit a wooden fence on Sunday morning.
The incident happened at 4.20am on the N59 in Kilbride, Newport. The man was the sole occupant of the car.
