Police on Friday asked Vietnam's supreme prosecutors to press charges against three overseas Vietnamese for trafficking heroin into the country.
The police have also put a warrant out for the arrest of Nguyen Winston, also known as Ba or Tran Khai, an overseas Vietnamese who played a major role in the ring.
Police and border guards in Tay Ninh Province on June 19 caught Le Van Buoc, 54, when the Vietnamese Australian was carrying nearly one kilogram of heroin containing methamphetamine from Cambodia.
The police then arrested another member of the ring, To Van Nam, 46, a Vietnamese American staying in Ho Chi Minh City.
Investigations revealed that the three of them formed a group with others in early June this year to traffic rock heroin and powder to make ecstasy.
Buoc has a store in HCMC from where he would ship the goods to Australia, in iron or steel containers. He pocketed half of the revenue, investigators found.
Nam told the police that between September 2006 and 2008, he was also involved in a ring that trafficked ecstasy and marijuana from Canada to the US.
He was one of 50 people whom the US Drug Enforcement Administration recommended governments to keep an eye on.