A woman has died and several people have been injured in four accidents on the A40 in Oxfordshire.
Up to 20 cars have been involved in the collisions. Roads are closed between Witney and Burford Road.
Police are appealing for Dashcam footage of four crashes involving more than 20 cars on the A40.
The pile-up happened at around 8.25am on Wednesday 28th December close to Witney.
A 56-year-old woman, who had been travelling in one of the vehicles involved in a collision, left her vehicle and was subsequently struck by another vehicle.
She was taken to the John Radcliffe Hospital with serious injuries where she remains in a critical condition.
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