Law enforcement agencies today valued the seizure, mostly found in a Melbourne warehouse in February, at almost USD 680 million.
Police say two Australian men, aged 53 and 36, had been charged with commercial drug trafficking and face a potential life prison sentence if convicted.
Police are searching for another two suspects in Melbourne.
The previous largest haul of the increasingly popular drug best known in Australia as ice was almost 880 kilograms seized in Sydney in November 2014.
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