Limbersey Lane near Haynes is currently closed while police attend a serious road traffic collision.
Emergency services were called at approximately 1.25pm to reports that a car had collided with a tree.
One person has been taken to Addenbrooke’s Hospital with life-threatening injuries.
The road remains closed while recovery work is carried out.
Anyone who witnessed the collision is asked to call police on 101 quoting reference 160 of 8 December.