A major road in Essex has been blocked in both directions following a multi-vehicle crash.
Both sides of the A12 between junction 19 for Boreham and junction 20 at Crix, near Chelmsford, have been closed.
National Highways said emergency services at the scene included the Essex & Herts Air Ambulance.
There are four miles of queues in both directions, and motorists are being urged to avoid the area.
