Two people have died in a crash on the M11 involving five vehicles.
Essex Police say a man has been arrested on suspicion of dangerous driving.
The collision happened on the northbound carriageway between junctions 7-8 Harlow to Stansted Airport junctions and involved a lorry, horse box and three cars.
The northbound carriageway will remain closed into the evening. Driers are advised to avoid the area and find alternate routes.
Emergency services have been called to the scene of a serious collision on the M11 in Essex. It happened at around 2.15pm and the road is closed northbound between junctions 7-8 and will be for some considerable time.
The collision between junction 7 for Harlow and junction 8 for Bishop's Stortford and Stansted involves a number of cars, a HGV and horse box with five horses on board.
One vehicle caught alight and there are serious injuries. One man has been flown by air ambulance to Addenbrooke's Hospital with internal injuries and another person taken by ambulance to hospital with a head injury. There are a further two casualties at the scene.
Several people have been injured in a "very serious" five-vehicle crash which has closed the M11 in Essex.
There are "multiple casualties" following the smash on the M11 between junction seven for Harlow and junction eight for Bishop's Stortford and Stansted Airport.
The motorway is shut in both directions after the crash involving three cars, a lorry and a horsebox, Essex Fire and Rescue said.
Five fire crews from nearby towns are at the scene of the accident, while the Hertfordshire Air Ambulance has been flying victims to hospital
M11 closed northbound jct 7 Harlow - jct 8 Stansted airport & v slow southbound due to a serious crash. Please avoid the area
A man who had nearly half of his head removed after falling from a balcony has had his skull rebuilt using the latest medical technology.Read the full story ›
A man from Stansted Abbotts, near Harlow, has had a section of his skull rebuilt using a 3D printer.
Lee Charie had to have a section of his head removed after falling off a balcony in a Thai hotel.
Doctors at Addenbrookes Hospital in Cambridge built a titanium plate modelled on the 3D printout, using the same metal used to build space shuttles.
He says after coming round from the operation, he was amazed by how good he felt.
"I feel alright, I couldn't believe how good I actually felt," he told ITV News Anglia.
"Even the way that I'm thinking and seeing things and I don't know how or why but it's really helped. It really, really does."
Detectives in Harlow have issued a photograph of a distinctive, bright red dirt bike which was stolen from a 16 year old boy in Harlow yesterday.
Police say the victim was riding along the path between Newhall and London Road in Harlow at around 6.40pm when he was approached from behind by somebody in a grey hoody who held a pointed weapon against his back and demanded the bike.
The suspect is described as slim build and spoke with a deep voice who then rode off on the stolen bike.
Dc Mike Ferguson said: "If anyone sees this in a garden, or sees someone riding it around the Harlow area, I urge them to contact police at Harlow CID on 101."
Police have issued an E-Fit of a man they want to identify in connection with a street robbery in Hodings Road, Harlow on April 9.
Just before 11pm a man threatened a 51 year old man with a pint glass near the Willow Beauty pub, demanding cash, the victim handed over £10.
The suspect is described as white, aged between 20 to 25 years old, 5ft 6inches tall, slim build, with a blemish under his eye.
Anyone who recognises the man from the Efit or has any other information is urged to contact Dc Georgette Beckett at Harlow CID on 101 or via Crimestoppers on 0800 555 111 where information can be given anonymously.