A 14-year-old girl has died following a hit-and-run collision which also left a 12-year-old seriously injured.
South Yorkshire Police has launched an urgent appeal to trace a car driver following the incident in Sheffield last night.
A force spokesman said the girls were crossing Normanton Hill, close to its junction with Richmond Hill Road and near to Richmond Park, when they were in collision with a car at 9.20pm.
He said the 14-year-old girl suffered fatal injuries. The 12-year-old girl was taken to hospital where she is being treated for serious injuries. Both girls are from Sheffield.
Officers have said the car has been described as small and dark-coloured, possibly green, and maybe a Volkswagen or a Honda.
It was travelling downhill, towards the A57 Mosborough Parkway.
Chief Inspector Stuart Walne said: "We urgently need to find the driver of this car.
"This is a tragic situation that has taken a young life and seriously affected another.
"If you were the driver of this car please contact police immediately. There may have been reasons that you didn't stop last night, but now a girl has died and we need to speak to you.
"The car is likely to be damaged from the collision. Have you noticed a small dark car that is damaged on your street this morning? Are your friends and family acting out of character today? Were they out in their car last night?"