New Zealand police reveal massive cocaine haul

The cocaine has been brought back to Auckland after a six-day journey from the open seas on board the HMNZS Manawanui, and will be destroyed.

Police Commissioner Andrew Coster said it was "one of the single biggest seizures of illegal drugs by authorities in this country" - worth an estimated $NZ500 million ($A453 million).

"This is the largest find of illicit drugs by New Zealand agencies by some margin (and) we believe this was destined for the Australian market," he said.

"We believe there was enough cocaine to service the Australian market for about one year and this would be more than New Zealand would use in 30 years."