A man was arrested as armed police were spotted on a Norwich estate.
An eye-witness said police cars arrived in Bowers Avenue in Mile Cross at around 9.30am on Tuesday.
A number of units, including a police dog and several officers with firearms, were pictured close to a block of flats.
Drugs-raid---Police-break-down-door-of-suspected-drug-dealer (1)
Norfolk Fire and Rescue said crews from Earlham and Sprowston were called to the scene, but they were stood down before arrival.
James Long said he saw at least five police cars on the scene.
He said: "It's the second time this year that something like this has happened. It never used to be like this around here."
He added he saw one man being placed under arrest.
The previous incident he referred to happened in the early hours of New Years' Day, when officers were called to Bowers Avenue following a "concern for safety".
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