A 19-year-old man has been arrested after four people were killed in a road accident in County Fermanagh.
Families of the victims have been at the scene of the crash
It happened in the early hours of Sunday on the Moorlough Road in Lisnaskea. Six people were in the car.
It careered off into a ditch before striking a tree. Two girls and two men who were in the back seat were killed.
They were Anita Swift, 16, Jonathan McDonald, 21, both from Newtownbutler, Danica Mary O'Rourke, 17, and Peter Seamus Leonard, 21, both of Lisnaskea.
The arrested man, who was driving, and the front seat passenger were taken to hospital. Their injuries are not thought to be life-threatening.
The Moorlough Road between Lisnaskea and Donagh Point was closed for much of the day as police examined the scene.
They have appealed for anyone who saw the car before the accident to contact them.
The accident took place at about 0330 BST on Sunday.
Peter Seamus Leonard was from Moorlough Road, Carrickmccusker, Lisnaskea. Jonathan Kevin McDonald was from Aghagay Park in Newtownbutler.
Anita Mary Swift was from Magheravelly Road in Newtownbutler. Danica Mary O'Rourke was from The Point, Attybarom, in Lisnaskea.
Families of the victims have been at the scene of the crash and flowers have been left at the wreckage.
The BBC's reporter at the scene, Mervyn Jess, said: "The car is a mangled mess of twisted metal and broken glass.
"Looking at it, it is remarkable that anyone survived this crash."
Police inspector Ian Kennedy said the tragedy would have a huge affect on people in the local area.
"Four young people have been killed in a single accident," he said.
"They are all between the ages of 16 and 21. It is absolutely terrible and words can't go to explain what has happened here.
"There is a wider part of the community which is affected by this, irrespective if whether they are directly related to the people or not."
'High death toll'
SDLP Assembly member Tommy Gallagher described the accident as "a terrible tragedy".
"Our sympathies are with the families of the young people killed who are mourning their loss," he said.
His SDLP colleague Fergus McQuillan, who knows the victims' families, said: "The two parishes of Newtownbutler and Lisnaskea are shocked and deeply saddened by this news that they have woken up to this morning.
"A tragedy of this scale has a massive impact on a small place like Fermanagh and no words can express the deep hurt and grief felt by the entire community."
Local DUP assembly member Arlene Foster said County Fermanagh "unfortunately has had a high death toll on its roads for a small county".
"This crash will devastate the community and our thoughts go with those involved and their families," she said.
Sinn Fein assembly member Tom O'Reilly said the crash had shocked people in the area.
"It is tragic that once again young people, as each weekend goes by, lose their lives on our roads," he said.