SOUTH WALES POLICE are investigating a road traffic collision which occurred at 11.15pm last night (Tuesday, May 31) at Northway Garage, Bishopston, Swansea.
The single vehicle collision involved a red Alfa Romeo Mito containing four occupants.
A 19 year-old man from Landore and a 19 year-old woman from Blaenymaes were declared deceased at the scene.
A 17-year-old girl from Penlan was airlifted to hospital with life-threatening injuries and a 17 year-old boy from Birchgrove was taken to hospital with non-life-threatening injuries.
Families are being supported by specially trained officers.
The road was closed for a number of hours whilst investigation work was carried out.
Anyone who may be able to assist officers in this investigation is asked to contact South Wales Police quoting 2200182514.