A 20-year-old man has died after the quad bike he was driving collided with a bollard in the Roath area of Cardiff.
South Wales Police said that the collision happened at around 3.10pm on Pen-y-wain Road, at its junction with Morlais Street, where a green Kawasaki quad bike ridden by a 20-year-old local man collided with a traffic bollard.
The man was taken to the University Hospital of Wales, but was pronounced dead. The coroner has been informed.
The road was closed for around three hours while police carried out their initial investigations and recovered the bike.
Officers say they are now appealing for any witnesses to the collision to contact them. It is not thought that any other vehicles were involved, but police would like to speak to anyone who saw the crash, stopped to provide assistance, or may have seen the bike being driven prior to the crash who has not yet given their details.
Anyone with information is asked to contact the South Wales Police serious collision investigation unit on 101 or Crimestoppers anonymously on 0800 555 111.
A police spokeswoman added that a police family liaison officer has been appointed and is supporting the next of kin of the man who died.