Armed police were called to the city's clubland this bank holiday weekend following reports that a man was threatening people with a needled syringe.
Officers were called to Bar and Beyond in Prince of Wales Road at around 8pm on Friday, April 15.
Door staff had been involved in a disagreement with the known male when he threatened them with a needle.
Officers were seen in nearby Queen Street.
A man was arrested.
Police are treating it as an isolated incident.
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