A teenage girl fell down a steep bank on Great Barrier Island last night.

The Westpac Rescue Helicopter was called to Port Fitzroy on Great Barrier Island just before 8.30pm after a teenage girl fell down a steep 2m bank and hit her head on a rock at the bottom.

The crew treated the girl and flew her to Auckland Hospital in a moderate condition.

The accident happened less than a week after 16-year-old Jakesha Wilson was left battered and bruised in a 20m fall from Devonport's North Head late last Friday night.

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A 16-year-old boy also fell while trying to rescue her.

The pair were rushed to hospital in a serious condition.