Residents in Avondale woke to a heavy police presence in the area as police descended on a property on Taramea St.
A resident in the Auckland suburb contacted the Herald and reported seeing about 10 police cars on the street.
A police spokeswoman said there was a pre-planned search warrant in the area.
"Due to the operational nature of these we won't be able to provide you with any further information at this stage," she said.
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More to come.