(CNN) -- The Australian navy has destroyed nearly 353 kilograms (780 pounds) of heroin after intercepting the drugs on a smuggling vessel off the coast of Tanzania, the Australian Department of Defense said Friday. Authorities estimate the street value at 706 million Australian dollars ($630 million U.S.). A team from the aircraft carrier HMAS Melbourne boarded the smuggler ship Wednesday during a sweep, according to a prepared statement. It tested the substance on board, determined it to be heroin, then confiscated it. Members then extracted samples and destroyed the rest.
The Australian navy has destroyed nearly 353 kilograms (780 pounds) of heroin . It intercepted the drugs on a smuggling vessel off the coast of Tanzania, officials said . A team from the aircraft carrier HMAS Melbourne boarded the smuggler ship Wednesday .