Three men were arrested and 110,000 methamphetamine pills and 28 kilogrammes of crystal methamphetamine seized in a search of a passenger bus in Li district of Lamphun province early on Wednesday.
Soldiers from the 2nd Infantry Battalion and Li district police manning the drug checkpoint at Ban Wang Din in tambon Pa Phai stopped the Bangkok-bound Transport Company bus from Chiang Mai's Chom Thong district for a search shortly after midnight.
They found drugs in three suitcases - the first with 11 packages totalling 110,000 meth pills, the second with 12kg of crystal meth and the third with another 16kg.
The owners of the three suitcases - Wichian Laota, Kowit Laota and Sompol Sae Lee - were arrested.
Police alleged the three confessed to being hired for 220,000 baht to deliver the drugs in the three suitcases to a client in Ayutthaya province.
They were charged with having illicit drugs in possession with intent to sell.