Armed police at the scene of the blaze. Photo / Hayden Woodward
A fire at Auckland Central Police Station is being treated as suspicious.
Sixteen fire engines and a number of additional support vehicles attended the blaze which started at 11.30pm.
A Fire and Emergency New Zealand spokesman said it appeared the fire had started in the gym and the smoke triggered alarms in an adjacent building.
There were no reports of anyone being hurt in the fire.
FENZ assist area commander John Booth, who was at the scene, said the fire was being treated as suspicious.
Emergency crews attended from around the region including Avondale, North Shore and Onehunga.
At one stage smoke could be seen billowing from the building.
Two ambulances were also called to the scene.
A selection of cartoons from Herald cartoonist Rod Emmerson over the past year