At least four people have died after a crash involving several vehicles, including a lorry, on the M5 motorway in south Gloucestershire.
Emergency services were called just after 2:30pm on Saturday to junctions 15 and 14 to the crash which has resulted in the motorway being closed and large tailbacks forming.
Avon and Somerset Police said the motorway would be shut “for a considerable amount of time” and asked drivers to avoid the area.
Highways England warned of “long delays” and said there was a six-mile queue northbound between junction 18 for Avonmouth and 16 for Almondsbury.
The Mirror reported witnesses as saying the accident happened after a lorry travelling on the southbound carriageway smashed through the barrier and ploughed into “several vehicles.”
Witness Rose Harris write on Twitter: “Bloody hell. Lorry travelling southbound on M5 just crossed central reservation into oncoming traffic. Does not look good.”
Police are yet to comment on the circumstances surrounding the crash.
Pictures on Twitter show a white lorry crashed off the road.