A suspected drug driver has been arrested after a young woman was left fighting for life in a horrific road crash in southwest London.
The victim, in her 30s, had been the pillion passenger on a motorcycle that collided with a Honda Civic on Garratt Lane, Wandsworth.
Officers and London Ambulance Service attended the scene around 1.30am on Wednesday.
A Metropolitan Police spokesperson said the woman was treated by medics before being taken to a west London hospital where her condition is critical.
The spokersperson added that the male rider of the motorcycle, aged in his 40s, was also taken to hospital.
"We await an update on his condition," the spokesperson said.
The 22-year-old driver of the Honda Civic was detained on suspicion of drug driving causing serious injury.
He was taken to a west London police station where he remains.
Road closures and cordons remain in place along the A217 Garratt Lane and between Kimber Road and Aslett Street.