Thames Valley Police is appealing for witnesses following a collision that caused serious injury in Oxford Road, Garsington, today.
At around 5.45am a cyclist was travelling along the road, near to the junction with the Hill, when he was involved in a crash with a vehicle that failed to stop.
The vehicle is described as either a car or light van.
The cyclist, a 50-year-old man, was taken to the John Radcliffe Hospital with injuries to his ribs and collarbone. He remains there in a stable condition.
We are appealing for anyone who was in the area who may have witnessed the incident to come forward.
"Similarly, if a driver on this road feels their vehicle may have been involved, we would appeal for them to come forward to police so that all the circumstances of this incident can be investigated."
Anyone with information is asked to call PC Edward Turner on 101, or Crimestoppers anonymously on 0800 555111.