Multiple fire engines have been called to a large scrub fire near Taupō.

Fire and Emergency New Zealand shift manager Paul Radden confirmed firefighters had been called to a the fire at about 3.10pm.

Up to 8 fire trucks attended the scrub fire on the east side of Lake Rotokawa on Rapids Rd.

A spokesperson for Rotokawa Geothermal Power Station said it was unknown how the fire started although ground conditions were currently dry.

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The attending fire officer said it was believed the fire began at 3pm and emergency services were now in the mopping up phase.

At 5pm a Mercury spokeswoman said the fire was in an area Mercury staff were not active in, and there was no current threat to its power station.