Three people have died in separate road accidents in Cavan, Dublin and Co Antrim.
In Cavan, a motorcyclist in his late 20s has died in a road crash in Co Cavan.
The man was fatally injured in a collision with a truck at Drumgart, Belturbet at around 11.25am.
He was taken to Cavan General Hospital where he was later pronounced dead.
The truck driver was not injured in the collision.
Gardaí have appealed for witnesses to contact them at Ballyconnell Garda Station on 049-9525580, or any Garda Station.
In Dublin, gardaí are investigating a fatal accident in Drumcondra in which a woman in her late 60s was killed after being struck by her own car at around 1.15pm.
She was taken to the Mater Hospital, where she was later pronounced dead.
Gardaí have appealed to anyone who was in the Millbourne Avenue area between 12.30pm and 1pm, near the library.
Anyone who may have witnessed the incident or seen a blue Ford Fiesta is asked to contact Santry Garda Station on 01- 6664000.
In Northern Ireland, a 14-year-old boy, who was seriously injured in a road crash in Co Antrim early this week, has died in hospital.
Clarence Campbell was knocked down by a car at the Victoria Road in Carrickfergus, Co Antrim last Monday.
Appeal for witnesses
Elsewhere, gardaí in Limerick are appealing for witnesses to a fatal collision at Grange Cross, Tipperary Road last Saturday.
The incident happened at approximately 9pm.
There were two car cars involved and a number of people were brought to Limerick General Hospital.
A 17-year-old passenger, who has been named as Ciaran Quigley from Rearcross, died in hospital yesterday from his injuries.
The teen was sitting his leaving certificate exams at Newport Secondary School.
Anyone with information is asked to contact Roxboro Road Garda Station 061-214347, the Garda Confidential Line 1-800-666-111 or any Garda Station.
Elsewhere, gardaí have appealed for witnesses to a fatal road crash yesterday in Dún Laoghaire in Dublin.
A man in his 30s died in the crash on Kill Avenue at about 2.15pm.
Gardaí are asking anyone with information, or anyone who was in the Kill Avenue area at the time, to contact them at Dún Laoghaire Garda Station on 01-6665000.