Customs officers in Ho Chi Minh City said Sunday that tests had established that the 1.3 kilograms of white powder seized from a Vietnamese-Australian at Tan Son Nhat Airport Friday were heroin.
They found the drug in the luggage of Nguyen Thi Minh Loan, 57 when she was about to leave HCMC for Sydney.
They have handed over Loan and the drugs to the city police department for further investigation.
Vietnam has some of the world's toughest drug laws, with those convicted of smuggling more than 600 grams of heroin facing the death sentence.
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