Some 255 kilogrammes (562 pounds) of crystal methamphetamine was seized by US authorities in northern California last month, with the Australian Federal Police putting the street value at Aus$255 million (USD 202 million).
"This is a small aircraft which we allege was to be flown from the west coast of the US, across the Pacific, to Australia to land in a regional airfield with an extra weight of 255 kg on board," said Superintendent Krissy Barrett, according to The Australian newspaper.
A 58-year-old from Victoria state was arrested yesterday, a few days after a Sydney man, 52, was detained for links to Aus$2.4 million in cash stashed in a vehicle, police said.
A third man, aged 72, was taken into custody at Melbourne Airport in early July for allegedly planning to fly the light aircraft back to Australia with the drugs.
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The US Drug Enforcement Administration's Sydney representative Eric Baldus said such international cooperation was necessary as the top criminal syndicates were "sophisticated, well-organised, and transnational in scope".
With its high street prices, Australia is an attractive destination for drug-smugglers. The country also has a growing problem with ice addiction.