Traffic is backing up near the Pedestal roundabout in High Wycombe amid reports of a car crash.
The crash has happened on West Wycombe Road and eyewitnesses say they saw a "smashed up" car and some ambulances.
Traffic is reportedly backing up in "all directions" and drivers should avoid the area if possible.
The crash happened sometime around 5.45pm.
An eyewitness told the Bucks Free Press an emergency worker was directing traffic near the Pedestal roundabout, which joins West Wycombe Road and Bradenham Road.
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