A young woman was killed when a car carrying six people became airborne before smashing sideways into a lamppost after the driver lost control at a roundabout.
Megan Johnston (22) died and two passengers were left fighting for their lives after the horrific collision on the ring-road outside Skibbereen in west Cork.
The driver of the BMW 3-series car, a 23-year-old local man, was arrested at the scene shortly after 2am.
The driver was later brought from Clonakilty garda station to Cork University Hospital (CUH) to have non-life threatening injuries treated.
Five of the six occupants of the car were injured in the collision which occurred at 1.45am.
The group of friends was returning home after being out socialising together. They had decided to delay returning to college and work to attend a GAA football match between Skibbereen side O'Donovan Rossa and Rosscarbery in the Kelleher Shield.
The six are all from Skibbereen and its surrounding area and went out to celebrate Skibbereen's victory.
It is understood the next 24 hours will be critical for the two unconscious passengers fighting for their lives in CUH.
Ms Johnston, who was an only child, was pronounced dead at the scene despite desperate efforts by paramedics to save her.
Her grandfather Philip told the Irish Independent that the family were "absolutely heartbroken" .
He visited the accident scene with other family members and Megan's friends at lunchtime yesterday to lay flowers and to pray.
"She was such a lovely girl. She always had a smile and a kind word for everyone," he said.
"The sad thing is that life is very brief and very short. We do not know when we are leaving this life."
A small shrine of flowers built up over the day as locals paid tribute to a young woman described as "totally devoted to her family and friends".
It emerged last night that Ms Johnston's mother, who worked in Lidl in Skibbereen, is currently being treated for a serious illness in Bantry General Hospital.
The young woman worked in Hennessy's Londis Supermarket on Skibbereen's Main Street and was said to be very close to her mother.
Ms Johnston, who was an avid music fan, also worked as a waitress in a restaurant and had spent time in Australia two years ago before returning home.
She is originally from Castlehaven.
Skibbereen gardai have appealed to anyone who witnessed the collision or the silver BMW in the minutes before the tragedy to contact them.