Four men have died in three separate road crashes in counties Meath, Kildare and Donegal.
In Co Donegal, two men died following a collision between their car and a van on the N13 dual carriageway at Trimragh, Letterkenny at 4.45am.
The men, aged in their late teens and 20s, were pronounced dead at the scene.
The driver of the van, a man in his 40s, was taken by ambulance to University Hospital Letterkenny with non-life threatening injuries.
The Garda Síochána Ombudsman Commission said it is investigating the crash after reports "that there had been some interaction between gardaí and the vehicle in which the two young men were travelling prior to the collision".
Witnesses are asked to contact Letterkenny Garda Station on 074-9167100 or the Garda Confidential Line 1800-666-111.
In Co Meath, a 42-year-old man died following a two-car collision at Castlefarm near Dunboyne.
The man was seriously injured in the head-on crash, which happened at around 8.50pm last night.
He was taken to Connolly Hospital Blanchardstown where he was later pronounced dead.
Five people in the second car were also taken to hospital, however their injuries are not believed to be life-threatening.
Gardaí have appealed for any witnesses to contact Ashbourne Garda Station on 01-8010600 or the Garda Confidential Line.
Separately, a man in his 20s died following a collision between his car and a truck on the Clane to Kilcock Road near Baltracey in Co Kildare at around 11.30pm last night.
The man was pronounced dead at the scene and his body was removed to Naas General Hospital.
The driver of the truck was taken to Connolly Hospital Blanchardstown with minor injuries.
Anyone with information on the crash should contact Leixlip Garda Station on 01-6667800, the Garda Confidential Telephone Line or any garda station.
More than 100 people have died on Irish roads since January.
Yesterday, the Road Safety Authority called on the Government to increase the number of gardaí in the traffic corps as it emerged that road deaths are up 8% on this time last year.
Eight people have now died on the roads since Sunday, including a woman and her 14-year-old son who were killed in a road crash in Co Galway on Tuesday.
