Police are attempting to trace a motorcyclist after a fail-to-stop collision in Kentford this afternoon, which has left a cyclist with a serious head injury.

Officers were contacted just after 3pm to reports of a collision between a pedal cycle and motorcycle on the B1506.

It is thought the motorcyclist rode off towards Newmarket without stopping or leaving details.

Police and ambulance attended and found the cyclist, a man thought to be in 50s, with shoulder and arm injuries but it became apparent that he had also sustained a head injury and may have internal bleeding.

An East of England Ambulance Service NHS Trust spokesman said they were called at 3.06pm.

A land ambulance, along with an East Anglian Air Ambulance attended the incident.

He added the patient was conscious and breathing, and complaining of an arm injury, before further assessment found he had suffered a head injury.

The man was taken to Addenbrookes Hospital by land ambulance, and the road was closed until 5.54pm while initial enquiries took place at the scene.

Police are asking the motorcyclist involved, anyone who saw the incident or anyone with information about the motorcycle or the person riding it to call Suffolk Police on 101, quoting CAD 271 of February 17.