Four people were killed on the roads over the weekend.
Two elderly pedestrians died in separate incidents in Cos Galway and Donegal, bringing to 12 the number of road fatalities in the Republic so far this year.
And, in the North, two men in their 20s died and a third was critically injured when their car crashed at a well-known accident black-spot on the outskirts of Dungiven, Co Derry, early yesterday morning.
Mr Cathal O'Kane (21), from Claggan Road, Claudy, Co Derry, and Mark Anthony Bonner (27), from Mitchell Park, Dungiven, were killed instantly when the Renault Laguna car in which they were travelling crashed into a hedgerow on the outskirts of Dungiven on the main road to Limavady.
Mr O'Kane's twin brother, Christopher, was in a critical condition in Altnagelvin Hospital in Derry yesterday as a result of the injuries he sustained in the accident in which no other vehicle was involved.
The victims were given the last rites at the scene by local curate Father Andrew McCloskey.
Local Sinn Féin councillor Ms Anne Brolly said the accident had happened along a stretch of the Dungiven to Limavady road where up to half-a-dozen people had been killed in recent years.
"All the local councillors have lobbied the powers that be for years to have something done with this part of the Ballyquin Road at Camnish Corner. It's a notoriously dangerous section of the road."
In Co Galway, gardaí are investigating the fatal crash at Aille, Inverin, last Friday evening in which 81-year-old Ann Mac Dermott died.
Ms Mac Dermott, from Aille, was struck by a van while walking through the village at about 5.40 p.m. She was taken to University College Hospital, Galway, where she later died.
Also on Friday, Ms Frances Mc Ginley (81), Gortahork, Letterkenny, Co Donegal, died when she was struck by a car in her home town at about 8.40 p.m.
Ms McGinley was pronounced dead at the scene and her body was removed to Letterkenny General Hospital.
Meanwhile, gardaí in Co Kildare are investigating the death of a man in his 40s in a house fire on Saturday night.
A unit of the local fire brigade recovered the man's body from an apartment above a shop on Eyre Street, Newbridge, at about 6.45 p.m.
Gardaí said they believed the man was a non-national but a positive identification had yet to be made last night.
No one else was injured in the fire.