The Garda Ombudsman today launched an investigation into the death of a pedestrian struck by a car driven by an off-duty garda during a day of carnage on the roads.
The collision in Oughterard, Co Galway, early this morning was one of a spate of road crashes overnight which claimed five lives within hours of each other.
The victim, a man in his 50s, was killed when he was struck by the car at Glebe at 1.50am.
He was pronounced dead at the scene and his body was taken to University College Hospital Galway for a post-mortem examination.
"An off-duty member of the Garda Síochána who was driving his own vehicle was involved in the accident which has resulted in the death of a member of the public," said a Garda Ombudsman spokesman.
Ombudsman investigators were gathering evidence at the scene as part of their inquiries.
Gardaí said the N59 Clifden to Galway road would remain closed for some time during the day.
Around the same time as the Oughterard crash, a 24-year-old man died after the car he was driving left the road in Williamstown, Co Galway and crashed into a field.
There was no other vehicle involved in the collision on a stretch of road between Williamstown and Ballymoate sometime after 1.50am.
Meanwhile, a man in his 20s died after he was struck by a van in Cork City.
The collision happened at the South Ring Road between the Kinsale Road roundabout and the Sarsfield Road roundabout at around 3.30am today.
Gardaí at Togher Garda station are investigating and appealed for any witnesses to come forward.
Just half and hour later a 19-year-old woman who was walking at Dooballagh, Letterkenny in Co Donegal died after she was hit by a car.
She was named locally as Lisa McMenamin from Corraine in Ballybofey.
At 8am a car crashed on the main Craughwell to Athenry road in Co Galway killing a man believed to be in his late 20s or early 30s.
He was Barry Kelly, from Athenry, a driver for the Mayor of Galway City.
It is believed he was setting off for Shannon Airport with his brother and a friend to go on holidays when his SUV careered off the road in a freak accident.
Former Galway Mayor Niall O Brolchain said he was devastated by news of the death.
"I would like to pay tribute to Barry. He was a man of very many talents and great generosity of spirit," he said.
"He was the consummate professional and always had a good word for everybody.
"My family and I are devastated by his untimely death and wish to pass on condolences to his family and friends."