Officers were called at about 11.15am to reports of a collision involving two pedestrians and a BMW. The air ambulance attended but the two men were pronounced dead at the scene. The men, believed by police to be in their late teens to early twenties, have not yet been identified and officers are trying to trace their next of kin. The driver, believed to be in his 40s, left the scene on foot. The police helicopter and dog unit assisted with a search of the area but the driver has not yet been traced. A spokesman for Cambridgeshire police said: The road is currently closed in both directions and is expected to be closed for some time. Motorists are asked to avoid the area. Officers are appealing to anyone with information about the incident or the whereabouts of the driver to contact them. The spokesman added that officers are also looking at whether a call from a member of the public reporting a man entering their home is connected to the incident and the discovery of a briefcase containing a quantity of cash which was recovered in the area. Anyone with information is asked to contact police on 101 or Crimestoppers, anonymously, on 0800 555 111.