A crash involving four vehicles is causing severe delays on the M1 Southbound this morning.

Herts Advertiser: Emergency services are at a huge crash on M1 Southbound Junction 9-8 which has left people trapped in a vehicle and closed the road. Picture: Chris WrightEmergency services are at a huge crash on M1 Southbound Junction 9-8 which has left people trapped in a vehicle and closed the road. Picture: Chris Wright (Image: Archant)

The M1 Junction 9-8 at Redbourn and Hemel Hempstead is expected to be closed for at least another two hours after a crash has left passengers trapped inside a car.

Police are advising people to avoid the area if possible.

Emergency services are at the scene.