A hazardous materials unit was sent from Hamilton to assist.
Emergency services attending the incident on Anzac Ave in central Auckland. Photo / Jason Dorday
Herald photographs showed firefighters in hazmat gear being sprayed in a portable shower.
Radden said decontamination was precautionary because unknown contaminants may be on the smoke-affected level.
Hato Hone St John said it was notified of the incident at Anzac Ave at 5.15am today. One ambulance, one rapid response unit and one operations manager attended.