Detectives are questioning two people over the death of a 12-year-old boy who was killed in a hit-and-run incident involving the police.
Bilal Raffey Khizar was on a road crossing on Rooley Lane in Bradford when he was hit by the red Seat Ibiza at around 7pm on Saturday.
The incident happened as the vehicle made off at speed after being stopped by police for a check, West Yorkshire police said.
A marked police car pulled over the Seat Ibiza in a lay-by on Rooley Lane, but as officers got out of their car to approach the vehicle, it made off at speed along the road, a force spokesman added.
Police followed the car, which collided with Bilal on a crossing close to the Asda store just moments later.
The spokesman said: "He tragically died of his injuries."
The car did not stop but continued to the Chain Bar roundabout on the M606, where it was in collision with two other vehicles. It was later found on Westfield Lane, in the Wyke area of Bradford.
Two people were later arrested as a result of police inquiries, which were said to be at a very early stage. The Independent Police Complaints Commission (IPCC) was contacted and an investigator attended the scene.
Detective Superintendent Mark Ridley, who is leading the investigation for West Yorkshire Police, said: "This is a tragedy for the family and they are absolutely devastated. Specially trained officers are currently working with them.
"I am appealing directly to anyone who saw the vehicle being driven or the incident to get in contact. I need the community to come forward and tell me what has happened and what they have seen to help bring justice to the family."