At 11.20pm, they went to a property in Baan Liporn Khaolan where they found Ms Peenapa Thipnetsakul, 23, in possession of 22 ya ba (methamphetamine) pills.
She was charged with intent to sell, and then after questioning led police to another man, Mr Niwat Sealim, 24, who was found to be carrying 10 ya ba pills and 0.56 grams of ya ice (crystal-methamphetamine).
Both of them admitted guilt and were taken to Thalang police station.