The Australian navy says it has seized a haul of heroin worth more than A$520 million in the Indian Ocean during its operation in the Middle East.
The heroin weighed 581 kg, and was found aboard a stateless boat (dhow), by the Her Majesty’s Australian Ship (HMAS) Newcastle off the east African coast.
The Australian sailors discovered the heroin after boarding the dhow.
The findings mark the second largest haul recorded by the Combined Maritime Forces (CMF), officials say.
Australia is part of a US-led maritime mission that works to eliminate piracy, terrorism and drug trafficking.
The mission involves 30 countries, patrolling 2.5 million square miles of international waters in the close proximity of the Middle East and Indian Ocean.
Commander Dominic MacNamara, HMAS Newcastle's commanding officer said he was pleased by the crew's success and added, "Newcastle has again succeeded because of the professional manner in which they have carried out their duties and their meticulous observation of suspicious activity."
No statement was made regarding which country’s shores were closest to the dhow when it was found.