Around 23 fire trucks have joined the operation to douse a massive blaze that broke out at the SkyCity convention centre in Auckland.
Footage shared on social media showed black smoke billowing over the central business district, with health officials urging residents to take precautions against smoke inhalation.
There were no reports of injuries and the owner of the site said everyone had been evacuated.
The nearby Sky Tower, New Zealand's tallest building, has been closed until further notice.
There was no immediate official word on the cause of the fire or how many people had been at the centre when the fire broke out.
At least 14 killed in explosion at weapons depot in Syria
US hits five Iranian oil tankers after attack on Navy ships
UK gives air traffic provider a week to probe outage that halted flights
Serbia's President Vucic dissolves parliament, calls snap elections
With large crowds attending, Norway lays King Harald to rest
Jordan intercepts 18 Iranian ballistic missiles
Air traffic control issue disrupts flights at major UK airports
At least 73 injured after Houthi rebels attack Saudi civilian and energy facilities
