Armed police units responded to reports of two men with a knife in Borehamwood today.

Police received an emergency call at 11.42am and sent armed police and a police helicopter to the town, to support local officers.

The report police received was that two suspected armed men were walking down Shenley Road towards Elstree & Borehamwood train station.

They were believed to be in possession of a knife, Hertfordshire Constabulary said.

A search of the town was carried out by both officers on the ground and from the sky but the suspects could not be traced.

Anyone with any information for police should contact 101 quoting ISR 200 of April 7.