The Civil Aviation Authority (CAA) is stepping in to investigate two incidents involving drones on New Year's Eve in Auckland.
CAA Acting Director John Kay said after the investigation is done, the authority would take "appropriate action".
This comes after a police eagle helicopter narrowly avoided a crash with a drone in the early hours of New Year's day.
Acting district commander for Auckland City, Inspector Jim Wilson, said the helicopter's crew was forced to take "immediate evasive action to avoid a serious collision".
"The pilot and crew were left shaken after evasive action was taken."