Fire crews are battling a blaze at a Fulton Hogan facility in Auckland's Silverdale.
Fire and Emergency NZ received a call around 10:30am.
It said there are 13 trucks at the scene.
The fire has not spread to surrounding properties.
An eyewitness told 1News they also spotted a hazardous material vehicle at the scene.
Footage provided shows firefighters spraying water on a fire high up on a piece of equipment at the site.
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