A 15-year-old girl has been critically injured and 19 other people hurt as a double-decker London bus collided with two vehicles and hit a bus shelter.
The bus collided with a car, a single-decker bus and hit a shelter at West Croydon bus station London at about 12:20 GMT.
The driver of the 198 Arriva double-decker bus has been arrested on suspicion of drink driving.
London Ambulance Service (LAS) said paramedics treated 20 people, 18 of whom were taken to hospital.
A Met Police spokesman said the 15-year-old girl had been a passenger on the bus and was taken to a south London hospital.
He added: “She remains there in a critical condition. Her next of kin have been informed.”
Videos on social media showed dozens of emergency service workers at the scene.