A 17-year-old boy was robbed of an e-cigarette at knifepoint yesterday.

Armed police were called in after the robbery, which took place at around 11.20am (November 4) in an alleyway near York Road, in the Watford Fields area of the town.

Police say it was reported that a knife, thought to be a large kitchen knife, was shown.

The victim was not injured.

A search of the area was carried out by police officers, including armed units, and a 15-year-old boy was arrested at an address in the town.

He was arrested on suspicion of robbery.

He has since been released under investigation while enquiries continue.