A teenager has been taken to hospital after being hit by a police car on an emergency call, Scotland Yard has said.

The marked car struck the 18-year-old pedestrian in Clapham Road near Clapham Common, south-west London, at about 3.40pm on Friday, police said.

The teenager was taken to a nearby hospital and officers are awaiting an update on his condition.

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 in any way to the pedestrian.

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. We await an update on his condition."