Detectives are appealing for information after a woman was critically injured in a collision in Chingford.
Police were called at 03:00hrs on Monday, 7 May, to a collision in Station Road, E4.
Officers attended the location and established that a car had been in collision with a female pedestrian.
The woman has been taken to hospital by LAS. Her condition is critical. Enquiries are underway to establish her identity.
The driver of the car – a Ford Focus – stopped at the scene. The 23-year-old man was arrested on suspicion of causing serious injury by dangerous driving. He has been taken into custody at an east London police station.
Anyone who witnessed the collision or has information that may assist police is asked to call officers at Chadwell Heath on 020 8597 4874.