Nine people have been killed in road crashes on both sides of the border since Friday evening.
The latest victim was a 17 year old man who died following a crash near Draperstown, Co. Derry.
This death comes amid a weekend of carnage on Irish roads - yesterday evening a 24 year old man was killed in a crash in Co. Donegal.
The two car collision happened near Inver - the man was pronounced dead at the scene, and a second man suffered serious injuries.
And, a 21-year-old woman was killed when the car she was travelling in crashed into a tree at Newcastle road in Limerick yesterday afternoon.
The driver of the vehicle was injured and is being treated at Limerick Regional Hospital.