A search is underway for a person missing in the waters of a river at the head of Lake Wakatipu in Otago.
Emergency services were called to the Dart River near Glenorchy just before 3pm on Friday.
Dart River Jets are understood to be assisting the Coast Guard in the rescue and St. John has taken one other person to hospital.
Police said someone went into the water to help another person and then didn’t come out themselves.
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“A number of vessels are conducting searches on the water while two helicopters are conducting aerial surveys,” a spokesman said.
St. John was called to the scene and dispatched a helicopter, a first responder and an ambulance, a spokesman said.
“We examined and treated a patient who was transported by road to Lakes District Hospital in minor condition.”
Glenorchy is about an hour from Queenstown and emergency services.