A man is wanted by police for allegedly threatening a member of the public with a knife, moments after they followed a teenage girl.

At approximately 1am on Sunday, November 17 along Cromwell Avenue in Aylesbury, the girl in her late teens was being ‘harassed’.

A resident of a nearby property came out of their house and asked the man in question to leave the teenager alone, only to be confronted by the offender who threatened him with a knife.

The girl and the wanted man both left the scene in different directions.

The perpetrator has been described as a black man between 30 and 40 years old, and is of stocky build.

He was wearing blue jeans with a dark-coloured jacket.

Investigating officer PC Cristianne Doran, said: “I am appealing for any witnesses to this harassment incident to please come forward.

“Anyone with information or footage relating to the incident should call 101 or make a report on our website, quoting reference number 43240556054.

“Alternatively, for anonymity, you can also call the independent charity Crimestoppers anonymously on 0800 555 111 or via its website.”