A1 in Cambridgeshire closed in both directions - air ambulance at scene
The A1 in Cambridgeshire is closed in both directions.
The road has been shut southbound between the B661 and B1041 near Buckden following a collision.
The emergency services are on the scene and the northbound carriageway is currently being held for an air ambulance to attend.
Highways England said: "Please seek an alternative route and allow extra time for your journey this morning."