A nine-year-old boy has died after being hit by a van which is said to have left the scene, police say.
The collision happened in Keighley on Friday evening, with officers from West Yorkshire Police called shortly after 9.30pm.
While emergency services, including the air ambulance, were in attendance, the boy was pronounced dead at the scene.
A man has been arrested on suspicion of causing death by dangerous driving and remains in custody.
It was reported that a white van hit the boy, as well as another pedestrian who suffered minor injuries, before driving away, officers said.
A 49-year-old man was later arrested after attending a police station in North Yorkshire.
Detective Sergeant Fiona Allan, of West Yorkshire Police’s major collision inquiry team, said: "A nine-year-old boy has tragically lost his life and our top priority is supporting his family and ensuring that a thorough investigation is carried out into the events that have led to his death.
"This collision has happened right on the border of West Yorkshire and North Yorkshire and we are keen to speak to anyone who has witnessed this collision or who believes they may have seen the van involved immediately prior to or following this incident."
Information can be given to police by calling 101 or using the 101 live chat on the West Yorkshire Police website, quoting crime reference 13210474457.