Fire and Emergency NZ northern communications shift manager Daniel Nicholson told Stuff the fire had been located in the exterior wall of the building.
Fire crews work to extinguish the blaze. Photo / Doug Sherring
"Firefighters are currently working to extinguish the fire and we have about 13 or 14 trucks there at the moment."
A witness to the fire said it was exciting to watch as flames burst several metres into the air.
It is understood Mayoral Drive is closed to traffic.
Meanwhile, motorists are being warned to expect significant delays and consider alternate routes to the airport after a crash blocked the left southbound lane on George Bolt Memorial Dr at the intersection with Verissimo Dr.
MAYORAL DR, AUCKLAND CBD - INCIDENT - 4:25PM Mayoral Dr between Wakefield St and Wellesley St East is blocked due to an incident. Please follow the directions of emergency services on site and avoid the area. ^TH pic.twitter.com/URVXxXhj6F
