A person died on an Air New Zealand flight that landed at Auckland Airport on Friday morning.
Police received a call at 4:50am informing them of the death on flight NZ31 from Buenos Aires, Argentina.
They said the death was not being treated as suspicious. Air NZ said it was a "medical emergency".
A witness who was also on-board the flight but asked not to be named told Newshub the person appeared to be a female in their early 20s and had collapsed at the beginning of descent into Auckland.
"The flight crew were amazing. They worked with haste but no panicking. Very professional under what would have been pretty sad and stressful conditions," the passenger said.
The witness said the passenger appeared to be travelling as part of a group.
Once the flight landed, paramedics continued to treat the passenger but they later died.
"Passengers were unable to embark for around 30 minutes while emergency services met the aircraft," Air NZ told Newshub.
"Naturally, for privacy reasons we’re not able to provide further information about the passenger."