A woman is fighting for her life following a five-car pile-up near Newmarket.
Emergency services were called to the eastbound carriageway between junctions 36 and 37, close to the Rowley Mile Services, at about 11.40pm on Friday 22 November 2024.
The collision initially involved a single vehicle, a grey Nissan Silva, with further collisions occurring moments later involving a grey Volvo, a grey Ford Ecosport, and a blue Peugeot; a fifth unidentified vehicle left the scene before officers arrived.
The driver of the Ford, a 40-year-old woman from Mundford in Norfolk, was taken to hospital with life-threatening injuries and remains in a critical condition.
A passenger in the Ford, an 11-year-old boy, and the driver of the Volvo, a 45-year-old man from Wymondham in Norfolk, was taken to hospital with serious injuries
The Nissan and Peugeot drivers were both uninjured.
Cambridgeshire Police are appealing for witnesses and dashcam footage.