Firefighters are battling a bush fire on Auckland's North Shore.

The fire is at the intersection of Beach Rd and Long Bay Rd in the suburb of Long Bay.

One fire truck is at the scene, Megan Ruru of the Fire Service' northern communications centre said.

She described the blaze as a "big area of bush on fire".

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The fire was reported about 3.30pm.

Residents watch as firefighters fight the blaze. Photo / Supplied
Residents watch as firefighters fight the blaze. Photo / Supplied