A cruise ship passenger is missing, believed overboard, near Mahia Peninsula, on the east coast of the North Island.
Emergency services are searching the waters for a male missing from the Norwegian Jewel from around 7pm on Sunday evening, said Rescue Co-ordination Centre spokesman Vince Cholewa.
An Air Force NH90 helicopter has been called in from Ohakea, and continued the search overnight using sophisticated heat-sensing equipment.
A container ship was using powerful search lights in the rescue efforts led by Maritime New Zealand, Cholewa said early on Sunday evening.