Firefighters were called to Westfield Newmarket in Auckland to reports of smoke pouring out of the second level of the building.
A Fire and Emergency NZ spokesperson told 1 NEWS they were called at 7.42am, but later confirmed it was a false alarm caused by a diesel generator starting up.
Seven crews were sent to the scene and no one is believed to be trapped or injured.
A member of the public told 1 NEWS there is "lots of black smoke from Westfield Newmarket on the motorway and that black smoke is pouring from the building".
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