Fire crews are battling to contain a blaze engulfing a campervan which is believed to contain paint materials in West Auckland.

Emergency services were called to the fire on Delta Ave, off Great North Rd in New Lynn just before 4pm this afternoon.

Fire Service northern communications shift manager Paul Radden said two fire crews were at the scene, and the fire was "well involved'' when they arrived.

Police were redirecting traffic to nearby streets.

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No injuries were reported and the fire was not believed to be suspicious