These subs can travel 10,000 miles without refueling. More than 400 people have been arrested in the operation, which deprived the drug cartels out of more than $8.4 billion.

Smuggling cocaine from South America to Australia is particularly lucrative, as a kilogramme of the illegal drug can fetch up to $240,000 (£190,000) there - six times more than in the US, Colombian security forces said.

Altogether, the subs contained more than 1,400 tons of illicit drugs, including 225 tons of cocaine and 128 tons of marijuana, CBS News reports. “This is perhaps the largest seizure of cocaine in transit made by Colombia in history,

The Colombian Navy announced it intercepted six “narco subs” containing more than $8 billion worth of drugs in an international mission involving 62 nations, of which the United States was included, that was conducted over a six-week span.

A semi-submersible packed full of cocaine is the latest of a number to be seized in the Pacific Ocean.

The discovery of a semi-submersible vessel carrying cocaine in the Pacific was part of a global six-week operation against drug smugglers.View on euronews

Columbian authorities have cracked down on drug mule pirates who are transporting Class A substances to Australia – their biggest and most lucrative cocaine consumers