Police are investigating an alleged assault of a 16-year-old girl in an underpass near the A405 in Watford.

The incident is reported to have taken place at about 8am this morning, in an underpass between Redheath Close and North Approach.

A search of the area is has taken place in North Approach.

Anyone with any information about what happened can telephone the Herts Police non-emergency number on 101.