The arrests and drug seizures on Saturday, August 19, during raids at several undisclosed locations in the northern province of Son La and elsewhere were the conclusion of a monthslong investigation.

Law enforcement officials said in a statement the drugs were packaged for sale in hundreds of thousands of small bags. Multiple arrests have been made and more are expected as the investigation continues, the statement said.

One of the arrests was Le Dinh Tho, 44, a resident of Hanoi. The other names of at least two known persons have not been released to the public but all were ordered held awaiting their court appearances on drug possession and distribution charges.