Two Australian nationals have been caught carrying 3.5 kilograms of heroin at a Ho Chi Minh City airport, local customs officers said Sunday.

The customs unit at Tan Son Nhat International Airport identified the smugglers as J.N.A.J, 31, and 24-year-old K.C.G, both of whom held an Australian passport.

The drugs were discovered being secretly hidden in the passengers’ luggage as it was being scanned at the airport.

The two and their trafficked substances have been handed over to city police.  

Last Sunday Tan Son Nhat customs officers captured a 26-year-old Chinese woman who was bidding to illicitly bring 2.2kg of methamphetamine, also stashed in her luggage, into Vietnam. The woman, Li Chunying, was then charged with “illegally transporting drugs” after being given to local anti-drug police.

Chunying had traveled through several countries before arriving in Vietnam, sources said.

Vietnamese authorities have seized about 24 kilos of drugs and more than 2,000 synthetic drug pills at Tan Son Nhat since the beginning of this year.

Trafficking in heroin weighing 100 grams or more could result in the death penalty, according to Vietnam’s laws.