A driver has been arrested after a car was found on its roof with two passengers dead at the scene.
Emergency service rushed to Battersea, South London, but could do little to help the two people, a man and a woman, who were killed.
A 22-year-old woman who was driving and another passenger remain in hospital but thankfully their injuries are not life-threatening.
The driver was subsequently arrested on suspicion of causing death by dangerous driving.
At this early stage in the investigation, detectives do not believe any other vehicles were involved in this collision.
The collision happened on Latchmere Road, South London, at around 3.26am on Saturday, July 16.
Specialist investigators have been drafted in to figure out exactly what happened.
Police are urging anyone who may have witnessed the collision or have dashcam footage of the incident to come forward.