Up to 40 firefighters and support workers battled a blaze at an industrial unit in the Auckland suburb of Papakura overnight, after initial fears there may have been people in the building.
Fire and Emergency NZ was called about 11.15pm to the fire on Markedo Place, arriving to find one unit ablaze, Counties Manukau acting assistant area commander Brendon Irwin said.
In the past there had been issues with tenants living in the units, Irwin said.
"We were initially concerned that there may be someone inside the building but that's proved not to be the case."
Between 30 and 40 firefighters and support staff attended, Irwin said last night. The fire had been extinguished and crews were mopping up and checking the fire had not spread to other units in the block and could not reignite.