Armed officers and police dogs were called to reports of an assault on a shop worker in Belsize Park by a man carrying a gun.

Police went to the scene near the Tube station in Haverstock Hill on Thursday last week at about 4.30pm.

Witnesses said a man launched an attack on a 23-year-old shop worker, who was left with a small cut to his knee.

Several witnesses told officers that the suspect was holding a firearm.

A 54-year-old was held in connection with the incident. He was arrested near the scene and has been bailed to return to police pending further enquiries.

n Anyone with information can call 101 or Crimestoppers anonymously on 0800 555 111.