CHIANG RAI, Thailand - Police arrested three men and one woman and allegedly confiscated 200,000 ya ba tablets, which a drug-dealing network sent from Chiang Rai's Mae Sai district to Chon Buri's Pattaya City on a tour bus, National Police Deputy, Pol Lt General Chalermkiat Sriworakhan said yesterday.

Following a tip-off, police claim they nabbed Suthat Phanjee, 41, on Sunday morning while he was collecting the boxes of drugs from a tour bus company office in Pattaya.

The arrest of Seksan Sornsuparp, 42, followed at a Bangkok gas station and the arrest of Palida Rattanawirun, 21, in Wang Thong Lang district Sunday on evening. Allegedly the pair were supposed to pick up the drugs from Suthat.

In another case, following a tip off about a drug transport from Lampang to Central, two men aged 21 and 24, were arrested on Sunday afternoon along with six kilograms of crystal meth.

Police say they were waiting in a pickup truck to deliver the drugs to a customer in Nonthaburi's Bang Kluay district.