“It was just one machine that caught fire, we are not sure what caused it yet.”
He said it set off the sprinkler system and alarm and fire services were quickly on the scene.
“One person did go to hospital as a precaution, because they were the person putting it out,” he said, of a worker.
He said no-one was burned, and that worker walked out on their own.
A Fire and Emergency NZ spokeswoman said they arrived to a “well involved property fire” and about six fire trucks attended as well as an “aerial appliance”.
The fire was contained around 2pm on Thursday.
Thames St was cordoned off following the fire.