A woman stabbed two pilots and threatened to blow up a plane on a New Zealand domestic flight early on Friday, Radio New Zealand reported.
The pilots' injuries were not immediately known but they were able to land the aircraft and none of the seven passengers on board was hurt in the apparent hijacking.
The Air New Zealand flight, from the provincial town of Blenheim, landed at the main South Island airport in Christchurch at about 8:00 am (0030 IST) and the passengers were taken to a private room.
Wayne Johnstone, a passenger on board another flight to Invercargill, said he was asked to get off his flight and he saw police surrounding the aircraft involved, The Press website reported.
He said there was a sniper on the ground, and police rushed into the plane.
"I saw a dog go in, the passengers came out in a rush, then the woman came out, bundled to ground and searched by police and taken away," he added.