Two people were taken to hospital after a crash on the A11 at Attleborough on Sunday morning
The incident happened shortly after 11am at the Stag roundabout, and involved a BMW.
Two ambulance crews and a rapid response vehicle from the East of England Ambulance Service NHS Trust attended.
They treated two patients who were both taken to Norfolk and Norwich University Hospital for further care.
A spokesperson for Norfolk Police said the road was closed for about two hours, after damage to the road and roundabout, and an oil spill.