Four women were arrested for allegedly selling 90 kilograms of kratom leaves at a grocery store on the tourist island of Koh Samui on Monday evening.
Acting on a tip-off from local residents, an undercover official asked to buy kratom (Mitragyna) on the Samui Airport road in Tambon Borphut before officials stormed in to make the arrest at 5.30pm.
The joint sting operation involved troops from the Fourth Army Area, district officials and Borphut police.
Jaemnapha Thidindam 37, Uree Mapaklad, 58, Natthaphat Chuphet, 19, and Chanthana Phetthong, 53 were arrested after officials allegedly found them packing leaves into small retail packs. A pack filled with leaves in plastic bags was also found in a hidden hole outside the store.