Armed police swooped on Norwich's clubland to arrest a man after reports he had pointed a gun at another man.
Officers were called to Prince of Wales Road shortly before 10.25pm on Friday after reports of a firearms incident outside Mantra nightclub.
A man was arrested on suspicion of possessing an imitation firearm.
He was taken to Wymondham Police Investigation Centre for questioning. No one was hurt in the incident.
Superintendent Dave Buckley said: 'Officers managed to resolve the incident promptly, with the man detained three minutes after the 999 call was made.
'This is not currently being treated as a terror-related incident. We are treating it as an isolated incident and there is not believed to be any wider threat to the public.'
Detectives are keen to speak to anyone with any further information on the incident. They are asked to contact Norfolk Constabulary on 101 or call Crimestoppers anonymously on 0800 555 111.
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