UPDATE: Police are treating 'serious incident' on busy Chesham road as attempted murder

A serious incident in the early hours of the morning in Chesham has closed a busy road. 

Police shut Berkhampstead Road at around 1am following the incident, which has affected traffic this morning.

Officers say the road "is unlikely to open in the near future" and added that they are waiting for collision and crime scene investigators to attend. 

The nature of the incident has not yet been confirmed by the authorities. 

More information as we get it.