A CYCLIST is fighting for his life in hospital after being hit by a car at a roundabout.

Police say the man, a 77-year-old from Bicester, suffered 'life-threatening injuries' in the collision yesterday morning.

Passers-by rushed to his side and gave first aid before emergency services arrived. 

It happened just after 9am at the Kingsmere roundabout in Bicester, where Middleton Stoney Road meets Shakespeare Drive.

A black Peugeot 208 car hit the cyclist's blue mountain bike, and the rider was taken to the John Radcliffe Hospital in Oxford.

READ AGAIN: Road closed after roundabout crash

Investigating officer PC Julia Stroud, of the Serious Collision Investigation Unit based at Bicester, said: "I am appealing for anybody that witnessed this collision and have not yet contacted police to please do so.

"I’m particularly keen to hear from anyone who may have witnessed the car or the pedal cyclist in the moments before the collision, or who may have dash-cam footage of the incident.

"I would like to thank all those members of the public who stopped to help the injured cyclist and commenced first aid at the scene."

Anyone with any information can call the 24-hour non-emergency number 101, quoting reference number 43190385315, or make a report online.

Police closed Middleton Stoney Road following the collision.