Officers arrested the man by The Forum in Norwich after they were alerted that an individual had been seen with what was thought to be a firearm in nearby Haymarket.

He was reportedly tackled by police before being arrested on suspicion of possession of an imitation firearm and assault.

The teenager was arrested outside the Forum (Image: Newsquest)

The alarm was raised shortly after 1pm on Thursday when a witness arrived at Bethel Street to report the sighting.

Officers on patrol nearby as........

© Norwich Evening News