Police have arrested a man who allegedly groped a female passenger on a trans-Tasman Jetstar flight.
Police were called to Christchurch Airport just after 2.30am on Saturday.
"The man was arrested for assault. It was a complaint of a man sexually assaulting a woman on a flight from Australia," a police spokeswoman said.
The investigation is ongoing.
A Jetstar spokeswoman said a passenger made a complaint to the crew of inappropriate behaviour from another passenger.
"The passengers were separated for the remainder of the flight and support was provided.
"Our crew requested police meet the aircraft on arrival into Christchurch."