A teenage pedestrian was taken to hospital after being hit by a police car on an emergency call.
The marked car struck the 18-year-old youth beside Clapham Common, south-west London, at about 3.40pm on Friday, police said.
Medics took the teenager to hospital “as a priority”, but Scotland Yard said his condition was not believed to be life-threatening or life-changing.
A Metropolitan Police spokeswoman said the car was travelling with its blue lights on while responding to an emergency call not believed to be related to the pedestrian.
The crash was next to a pedestrian refuge island near Lambeth College.
The Met’s directorate of professional standards has been informed.
Scotland Yard said: “Officers in a marked police vehicle were involved in a collision with a pedestrian in Lambeth.
“The 18-year-old pedestrian has been taken to a south London hospital.”