Several ambulances have been called to a crash involving three vehicles.

Harper Lane, near Radlett, is blocked following a collision at around 3.30pm today, near the Kingsley Green Hospital.

It's believed a number of people have been injured - although police say they are minor injuries.

The collision is reported to have involved a Volkswagen Transporter, an Audi A3 and a Volkswagen Coupe.

Two of the vehicles need to be recovered and police remain at the scene.

As a result of the crash, there is heavy traffic in Harper Lane in both directions and the road should be avoided.

Drivers in this area should also be aware of delays on the M25 between j21 for the M1 and j25 for Cheshunt.

The A414 heading towards London Colney from Park Street is also slow, and there are queues in Watling Street near the junction of Harper Lane.