Emergency services are at the scene of a five-vehicle crash on the A1 at Newark.
Nottinghamshire Fire and Rescue has said that the crash has involved four cars and a motorhome on the southbound carriageway between Balderton and Coddington.
Reports from eyewitnesses indicate that an air ambulance is also at the scene.
Motorists should expect delays.
The latest crash comes just weeks after a six-vehicle fatal collision on the same section of road.