Six vehicles have been involved in a crash on the M25 sparking a tailback of traffic near Watford.

Police confirmed they were called to the incident between junctions 16 and 17 anticlockwise at 5.14pm today.

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National Highways has shown traffic reaching to junction 19, near Watford.

UPDATE: Three children and four adults taken to hospital after M25 crash

Ambulance services are also at the scene and the police have advised motorists to avoid the area if possible.

Police have said there does not appear to be any serious injuries.

Delays of up to 50 minutes have been announced. 

Normal traffic conditions are not expected to resume until 7.30pm.