Three people, along with 120,000 meth tablets, 10 bricks of heroin and 6kg of opium, were seized in the raids.
One of the cases was in Nam La hamlet, Muong Nhe district, Dien Bien province, on June 12, with two men from the Lao province of Phongsaly involved.
The other was found the same day in Son Tong hamlet, Na Tong commune, Dien Bien district, with a local man arrested.
The cases are under further investigation./.