The southbound carriageway of the A1 at Great Ponton is blocked due to an accident involving numerous vehicles.
The accident happened about 8am this morning. Photographs of the scene show vehicles, including a double decker bus and lorries, across the carriageway near the pedestrian bridge.
Diversions are in place and police are asking drivers to avoid this area of the A1 southbound. Northbound traffic is reported to be very slow. Police have said in the last 10 minutes they are awaiting the recovery of vehicles and drivers should expect long delays.