A man has been flown to Christchurch Hospital with serious burns after an explosion in North Canterbury.
Emergency services were called to Coopers Creek in Oxford just before 4pm - to reports of a shed fire.
They received more calls moments later about a big explosion.
A Fire and Emergency spokesman says when crews arrived on scene a large industrial shed - about 100m long - was well ablaze.
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One man was flown to hospital by the Westpac Rescue helicopter with serious burns to his body and suffering smoke inhalation.
Five crews are still on the scene.