Part of the M25 is shut after a serious crash in the Holmesdale Tunnel, with drivers trapped in the road closure.
Traffic has ground to a halt on the M25 at the Essex and Hertfordshire border following a serious collision.
The crash happened clockwise between junctions J25 Waltham Cross and J26 Waltham Abbey shortly after 8am.
The motorway is blocked in both directions to allow for the air ambulance to land.
The number of injuries or any casualties is not yet known.
All emergency services are at the scene.
Inrix, which analyses traffic data, said in an alert that two lorries were involved.
Drivers have been warned of long delays in the area and around five miles of congestion in both directions.
Queues are stretching back to J27 for M11, and diverted traffic clogging up parts of Waltham Cross and Waltham Abbey.
National Highways said: ‘The #M25 clockwise is now closed between J25 #WalthamCross and J26 #WalthamAbbey #HolmesdaleTunnel following a serious collision. The anti-clockwise carriageway remains held whilst air ambulance on scene. There are approx. 5 miles congestion in both directions.’
Traffic has been held in the Holmesdale Tunnel.
Footage shows an air ambulance landed in the middle of the anticlockwise carriageway.
The crash comes shortly after a collision and fire further east on the M25 between Romford and Brentwood this morning, which caused long delays.
Latest London news
- Over 11,000 people want women-only Tube carriages – but are they just a ‘gimmick’?
- Inside Ryan Gosling’s new London life as family relocate to Hampstead
- Wife of man crushed to death by toilet in London wants £200,000 compensation
To get the latest news from the capital visit Metro’s London news hub.
Metro has contacted the police for more information.
Got a story? Get in touch with our news team by emailing us at webnews@metro.co.uk. Or you can submit your videos and pictures here.
For more stories like this, check our news page.
Follow Metro.co.uk on Twitter and Facebook for the latest news updates. You can now also get Metro.co.uk articles sent straight to your device. Sign up for our daily push alerts here.
