Four men have been killed and a fifth seriously injured following incidents on the roads last night and this morning.
Two men died following a single-vehicle crash on the R173 at Carlingford in Co Louth -- that road has been sealed off for a crash investigation team.
A motorcyclist in his forties crashed along Whitestown Way in Tallaght, south Dublin at 7 am this morning.
He was pronounced dead at the scene.
A further two of the incidents involved pedestrians, aged in their twenties.
One man is dead following a collision on Moneynick Road, Toome, Co.Antrim.
It's believed he was hit by a car at around 8.20pm last night.
About fifteen minutes later, a man was struck by a car on Mary Street in the village of Drumlish, Co Longford.
The 24-year-old was taken to Midlands Regional Hospital in Mullingar with what Gardaí have described as serious injuries -- they're appealing for witnesses.
