More than 460 suspects were arrested and more than 1 million methamphetamine tablets seized during a week-long police and military assault on drug traffickers in eight northern provinces.
The 464 suspects, including seven accused drug smugglers, were apprehended between May 20 and 26 with some taken to a news conference in Nan province on Thursday.
Seized from them were 1.3 million speed pills, and varying amounts of crystal methamphetamine, heroin, opium and marijuana.
The joint operation also targeted suspects involved in smuggling of illegal military-grade weapons, other crimes and illegal migrant workers. A large number of weapons were seized and also displayed for the media.