Five fire crews are trying to control a fire raging in an industrial building in Nelson.
Two crews from Stoke and Nelson were alerted to the blaze at 4.13am in a 10x15m building on Pascoe St in the suburb of Annesbrook.
They received extra support from Stoke, Nelson and Richmond crews shortly after.
A Fire and Emergency spokesman said nobody was injured and there were no indications anybody was in the building.
"There is no indication of cause. At this stage the operation continues."