Two children have been killed and their mother seriously injured in a car crash in the West Midlands.
A 23-month-old and a 10-year-old died when the BMW they were in collided with an Audi A3 on Birmingham New Road in Wolverhampton at about 20:45 GMT on Thursday.
The driver of the Audi left the scene, police said.
A 31-year-old man from a third car, a Bentley, was arrested on suspicion of causing death by dangerous driving.
The mother remained in hospital with serious injuries on Friday.
Det Sgt Paul Hughes, from West Midlands Police’s Serious Collision Investigation Unit, said: “I would appeal directly to the driver of the Audi to make contact with us.
“You may not be fully aware of the full tragic circumstances but you now need to speak to us.”
The road was reopened at 03:40 GMT.