A seven-year-old boy has died after being hit by a BMW car allegedly driven by a teenager at a caravan site.
A 16-year-old boy is being questioned by police after being arrested on suspicion of causing death by dangerous driving.
The accident happened at the Shirenewton caravan site, east of Cardiff, south Wales, at around 3pm on Saturday.
"A seven-year-old boy from the caravan site was apparently in collision with a red BMW 3 series estate," a South Wales Police spokesman said.
"The boy was taken to the University Hospital of Wales where he later died from his injuries. Specially trained police officers are supporting the family.
"A 16-year-old youth from the area, who is believed to have been driving the BMW at the time, has been arrested on suspicion of causing death by dangerous driving and is in custody and inquiries are ongoing."
Anybody who witnessed the incident or who has any information is asked to contact the police on 101 or Crimestoppers anonymously on 0800 555 111.