A fire investigator will be looking into the cause of a house fire in Dargaville, in Northland, today.

It started just after 2am this morning in Awakino Road.

Fire Service shift manager Carren Larking says it was well-involved when firefighters arrived so they called for back-up.

The fire's now out but crews are still there dampening down hotspots.

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A fire investigator will be looking into the cause of the blaze.

No one was reported missing and all the residents were outside waiting when crews arrived.