The two teenagers who died in a crash in Co Donegal have been named locally as Alana Harkin and Thomas Gallagher from Gleneely in Inishowen.
Thomas, 18, was a Leaving Cert student at Moville Community College, while Alana, 18, had done her Leaving Cert earlier this summer at Carndonagh Community School.
They were on their way back from a restaurant where they worked.
The single vehicle crash took place on the R238 at Terrawee, Gleneely, at around 12.30am on Monday morning.
There were three people in the car.
A second man, also in his late teens, was taken to Letterkenny University Hospital with non-life threatening injuries.
The road between Gleneely and Culdaff was closed off as Garda Forensic Collision Investigators carried out a technical examination in the area to try to determine how the crash happened.
The crash brought to 163 the total number of people who have been killed on roads across the country so far this year, which is 37 more people than this day last year.
That figure has since risen to 165, following the death of a man in his 40s following a crash between two lorries in Co Monaghan and the death of a cyclist following a collision involving a truck and an e-bike in Dolphin's Barn, Dublin.
Taoiseach Leo Varadkar said it is a matter of "enormous concern" that more people have died on Irish roads this year than did all of last year.
He said the deaths of two young people in Donegal is very much on everyone’s minds.
"We have made so much progress in the last couple of decades," Mr Varadkar said.
"There was a time when 600, 700 people were dying on our roads and it is really disturbing to see that number, which had come down, going back up again and it is something I will be taking a personal interest in as Taoiseach."
Councillor Terry Crossan, Cathaoirleach of the Inishowen Municipal District of Donegal County Council said "we have had too many of these incidents in Inishowen" and the loss of another young girl and boy was absolutely heartbreaking.
Gardaí are appealing to any road users, who were travelling on the R238 in the early hours of Monday morning between midnight and 1am, and have camera footage, including dashcam, to make it available to them.
Anyone with information is being asked to contact Buncrana Garda Station on 074 932 0540, the Garda Confidential Line on 1800 666 111 or any Garda station.
Additional reporting Jennie O'Sullivan
