Three people have been rescued by helicopter from Tararua Forest Park after setting off a personal locator beacon.

A police spokeswoman said the rescue happened "quite quickly" after they were called at 4.23pm.

The Rescue Co-ordination Centre spotted the beacon and located their GPS position, before the Westpac Rescue Helicopter picked them up an hour later.

They were taken to the Otaki Forks car park. A police spokeswoman said their condition was unknown.