Five people on board crashed helicopter

Three men have been injured after a helicopter carrying five people crashed in the central North Island.

The helicopter, carrying five people, went down shortly before 9am on Thursday on Ngamatea Station in the Kaweka Ranges.

One man is in a critical condition, and two others are seriously injured, The Rescue Coordination Centre of New Zealand says.

St John assessed two other men after they were flown by rescue helicopter to Bridge Pa airport, A Hawkes Bay District Health Board spokesperson says.

They did not need medical treatment, the spokesperson says.

The Transport Accident Investigation Commission (TAIC) has opened an inquiry into the cause of the crash. 

The helicopter is believed to be a Hughes MD600N helicopter, TAIC Chief Accidents Investigator, Captain Tim Burfoot says.