Four people have died on Ireland's roads since last night.
The latest fatality happened at around 4.45am in Co Donegal when a car a van were involved in a head-on collision on the N13 at Trimragh, Letterkenny.
It comes after two men died in separate road accidents in Co Meath and Co Kildare last night.
Two men, understood to be in their late teens and 20s, were pronounced dead at the scene of the crash in Donegal.
The driver of the van, a man aged 40, was taken by ambulance to University Hospital, Letterkenny and his injuries are not thought to be life threatening.
The inbound stretch of the dual carriageway is closed to traffic and diversions are in place while Garda forensics examine the scene.
Investigations are ongoing and Gardaí are appealing for witnesses. Anyone with information is asked to contact Letterkenny Garda Station 074-9167100 or the Garda Confidential Line 1800 666 111.
A 42-year-old man died after the car he was driving and another car were involved in a head-on collision in Co Meath last night.
The crash happened on the R157 (Dunboyne to Maynooth Road) at Castlefarm near Dunboyne at around 8.50pm last night.
The man was seriously injured in the collision and was taken by ambulance to Connolly Hospital in Blanchardstown where he was later pronounced dead.
He was alone in his car, but the driver of the other car had four passengers and they were all taken to hospital.
Their injuries are not believed to be life threatening.
The road has been closed and diversions are in place as Gardaí examine the scene this morning. The local coroner has been notified.
Anyone with information is asked to contact Ashbourne Garda Station 01-8010600 or the Garda Confidential Line 1800 666 111.
In Co Kildare, a man in his 20s was killed when the car he was driving and a truck were in collision at 11.30pm last night.
The collision happened on the R407 (Clane to Kilcock Rd) near Baltracey, where the was pronounced dead before his body removed to Naas Hospital.
The driver of the truck was taken to Blanchardstown Hospital with what are described as "minor injuries".
The road has been closed for a Garda forensic investigation and diversions are in place.
Gardaí wish to appeal for witnesses to contact Leixlip Garda Station on 01 6667800, The Garda Confidential Telephone Line 1800 666 111 or any Garda Station.