Emergency services are on the scene but there are long delays in the area which is being treated as a “major incident”.
Police were called at 5.23am today to reports of a collision on the A47 between Thorney and Eye.
When officers attended the scene a single vehicle had left the road and was on its roof in a field. There are also reports that is was on fire.
The Ambulance Service and Fire and Rescue Service attended the scene. A man has been taken to hospital with serious, potentially life threatening, injuries.
The road is currently closed between Eye and Thorney as a result of the incident.
Anyone with information regarding this incident is asked to call the Roads Policing Unit on 101.