The smash took place at about 7.15pm in Ramsey Road, between Warboys and Wistow Toll, and involved a Mercedes AMG and a Land Rover Discovery. The driver of the Mercedes, a 22-year-old man, from Warboys, suffered serious injuries and was taken to Addenbrookes Hospital, Cambridge. His condition was described by Cambridgeshire police as critical but stable. The driver of the Discovery, a 66-year-old woman, from Warboys, was taken to Hinchngbrooke Hospital with what officers described as serious, but not life threatening, injuries.A spokesman for Cambridgeshire Fire and Rescue Service said crews from Ramsey, St Ives and Chatteris attended the collision. Two vehicles were involved and two people were extricated from the vehicles by firefighters and taken to hospital, added the spokesman.Anyone with information about the collision should contact the road policing unit on 101.