A cyclist suffered serious head injuries in a hit and run collision with a motorcycle in Oxford.

Police are appealing for witnesses after the crash in Knights Road, Blackbird Leys, at 2.30pm yesterday.

A 43-year-old female cyclist was taken to the John Radcliffe Hospital, in Headington, with head injuries and her condition is unknown.

The rider of the dark-coloured motorbike failed to stop at the scene.

Anyone with information should call police on 08458 505505 or Crimestoppers on 0800 555111.