Fire crews were kept busy throughout Auckland overnight as they battled two large blazes.
They were first called out just before 11pm to a two-storey warehouse fire on Hannigan Road in St Johns, northern fire communications shift manager Tania Matthews said.
About 20 appliances were called to the 40m by 40m building, which was "fully involved'' when fire crews arrived.
Crews have stayed at the scene through the night and were still there dampening down hotspots, Ms Matthews said.
Fire inspectors would arrive at the scene this morning to work out the cause of the fire.