Seven people have died this weekend following serious collisions in Louth, Monaghan, Cavan and Galway
A man in his 20s has been arrested by gardai investigating the two car collision that claimed three lives in county Louth early yesterday morning.
It is understood he is being detained under the provisions of section 4 of the Criminal Justice Act and was arrested on suspicion of dangerous driving causing death.
The three victims, all from Northern Ireland, died in the crash just across the Irish border in Co Louth in the early hours of Saturday.
They have been named locally as Mary Faxton, who was in her 80s, and her son Kevin Faxton, who was in his 50s, and Bryan Magill, who was in his 20s.
The two older victims were both occupants in one of the cars involved in the collision on the N1 at Carrickcarnan at about 2.15am on Saturday.
The younger man was travelling in the other car. Another man in his 20s, who sustained non-life threatening injuries in the crash, was also in that car.
The man arrested in connection with the crash on Sunday was detained at Dundalk Garda station.
He has an address in Northern Ireland.
Mr Magill was from Newry and the Faxtons from the nearby Co Armagh village of Bessbrook.
Archview United FC in Newry posted a tribute to Mr Magill, who played for the team.
"All at the club are heartbroken by the untimely death of one of our top men Bryan (bru) Magill!!!," it stated.
"Bru will always be remembered by all of us as a gentleman!!!
"Sleep easy our kid!!! Shout at us from above!!!"
Newry Celtic Football Club also paid tribute.
"Everyone at Newry Celtic are deeply saddened by the tragic death of our former player and friend Bryan 'Bru' Magill," it stated.
"The club would like to extend their deepest sympathies to his family at this devastating loss."
Meanwhile, a teenage girl has died following an early morning single car collision in Co Galway.
The girl, who was a passenger in the car, was fatally injured when the car struck a wall at 1.15am this morning, in Porridgetown, Oughterard, Galway.
Her body has been removed to the Mortuary in University Hospital Galway where a post mortem will take place.
The male driver of the car (21) was seriously injured but his injuries are not thought to be life threatening.
Gardai in Salthill, Co Galway, are investigating.
A garda spokesperson said: "Gardaí in Salthill, Galway are investigating a single vehicle road traffic collision which occurred at approximately 1.15a.m. this morning, Sunday 1st March, 2020 in the townland of Porridgetown, Oughterard, Galway.
"A young female (in her teens) was fatally injured when the car she was a passenger in stuck a wall. She died at the scene. Her body has been removed to the Mortuary in University Hospital Galway where a post mortem will take place. The driver of the car (male 21 years) was uninjured."
Gardaí are appealing to any road users who may have travelled the road and can assist them or drivers who may have dash cam to contact them in Salthill Garda Station on 091 - 514720, the Garda Confidential Line 1800 666 111 or any Garda station.
The collision is the latest road traffic incident to claim a life this weekend as six others have died on the nation's roads between Friday night and Saturday morning.
The loss of seven lives on the nation's roads has been described as "an appalling level of carnage" by the Road Safety Authority.
A man and a woman in their 60s died in a collision with a jeep in Cavan the N55 in Ballinagh, Co Cavan around 7pm on Friday.
The death toll rose to six when a male pedestrian in his 20s died after a separate incident in county Monaghan on Saturday.
The collision with a lorry occurred on the N54 between Monaghan town and Clones in the townland of Bandrum.
With additional reporting from Press Association