A man has died in a crash involving a lorry, a single-decker coach and two cars on the M5.
The 30-year-old from Birmingham, who was driving one of the cars, was killed in the collision close to junction eight in Gloucestershire at around 7am on Sunday.
Three of the 18 people travelling on the coach were taken to hospital with minor injuries, while the remaining passengers were moved to another vehicle.
A Gloucestershire Police spokesman said the motorway remains closed in both directions while an investigation is carried out.
The force said the road is shut northbound between junction 11 and eight and southbound between junctions eight and nine. Motorists are facing long delays and are advised to find an alternative route for their journey.
Anyone who witnessed the accident is asked to contact police on 08450 901 234 quoting incident 132.
A West Midlands Ambulance Service spokesman said they were also called to the crash site. He said they joined Great Western Ambulance Service and the Midlands Air Ambulance.
"Crews arrived to find a jacknifed lorry on the southbound carriageway," he said. "A car and a coach were also involved in the collision. Sadly, a man who was in the car was confirmed dead at the scene.
"In addition to the work of Great Western Ambulance Service crews, staff from West Midlands Ambulance Service dealt with 20 people from the coach. Two, both with minor injuries, were taken to Worcestershire Royal Hospital.
"The others were all assessed at the scene and ultimately discharged at scene, but the focus of the crews' work was to keep them warm on what was a very cold morning with freezing fog."