UPDATED 12.08pm:Â Investigators are trying to determine the cause of a large industrial fire in Northland.
The blaze started at the Robertson Plastics facility in Dargaville, around 9.30pm yesterday.
It's since been extinguished, but has left the building in tatters.
Two fire safety investigators are at the scene, along with crews from Dargaville dampening down hotspots.
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