The four girls were friends at Glyncoed Comprehensive

The teenagers, who all went to Glyncoed Comprehensive in the town, were in the back of a Vauxhall Corsa which was being driven by a 17-year-old friend.

He and another boy, also 17, survived the crash on the B4560 road between Llangynidr and Beaufort.

Police are still investigating the cause of Thursday night's crash.

Friends Danielle Caswell and Katie Roberts, who were 15, and Louise Jones and Kayleigh Parry, both 16, all died at the scene.

Grieving friends of the Year 11 students, who were due to take their GCSEs next summer, have been laying floral and soft tributes at the school gates all day.

Counselling will be offered when classes restart after half term next week.

Friends of the youngsters were in tears as they remembered them.

One of them Becky Love said she had last seen her friends on Tuesday at Halloween party at the local club in Garnlydan.

"We had a laugh...then we had this bad news on Thursday," she said.

Friends have laid tributes at the school gates

Another friend Vanessa Ball said she was "really good friends with the family" of Katie Roberts.

"Fabulous girl, she'll just be so missed, so missed," she said.

Elaine Chappell, a neighbour of Louise and chair of the local residents' association said: "It's terrible - when we realised Louise was one of those in the car, everyone was devastated because she was such a bright, attractive girl.

"We saw the others going back and fore to the house, all bubbly, they had all their lives ahead of them. They were very nice girls and very popular at the school."

The teenagers died when the Vauxhall Corsa crashed and rolled 70ft off the B4560 at Garnlydan near Ebbw Vale at 2120 GMT on Thursday.

Police confirmed the six friends had been travelling towards Garnlydan, near where the crash happened.

The mountain road covers open countryside, moor land and hills

They also said that while it was cold and frosty on the road at the time, the surface was not icy.

The road with its sharp corners and steep dips can be treacherous, especially for inexperienced drivers. The speed limit is 60 miles an hour, although local people say even that is too fast and they want it changed..

Councillor John Williams said: "It's not the first time. This is a dangerous road if you use a speed limit (of) 60 miles an hour".

Superintendent Dean Richards said :"We really need to piece together now exactly what has happened prior to the accident and then obviously look at the exact cause of that accident.

"That will take some time in respect of examination of the road and the scene, examination of the vehicle itself and then also explanations from the driver and the passenger"

The two survivors of the crash are in hospital in Abergavenny, although their injuries are not life-threatening. Officers still have to interview them about the accident.

Police are asking anyone in the area at the time to contact them on 0845 330 2000.