Disputes - international:
Separatist violence in Thailand's predominantly Muslim southern provinces prompt border closures and controls with Malaysia to stem terrorist activities; southeast Asian states have enhanced border surveillance to check the spread of avian flu; Laos and Thailand pledge to complete demarcation of their boundary in 2005; despite continuing border committee talks, significant differences remain with Burma over boundary alignment and the handling of ethnic rebels, refugees, and illegal cross-border activities; Cambodia and Thailand dispute sections of boundary with missing boundary markers; Cambodia claims Thai encroachments into Cambodian territory and obstructing access to Preah Vihear temple ruins awarded to Cambodia by ICJ decision in 1962; ethnic Karens from Burma flee into Thailand to escape fighting between Karen rebels and Burmese troops resulting in Thailand sheltering about 118,000 Burmese refugees in 2004;

Karens also protest Thai support for a Burmese hydroelectric dam construction on the Salween River near the border; environmentalists in Burma and Thailand remain concerned about China's construction of hydroelectric dams upstream on the Nujiang/Salween River in Yunnan Province.

Refugees and internally displaced persons:
refugees (country of origin): 118,407 ( Burma ) (2004)

Illicit drugs:
A minor producer of opium, heroin, and marijuana; illicit transit point for heroin en route to the international drug market from Burma and Laos; eradication efforts have reduced the area of cannabis cultivation and shifted some production to neighboring countries; opium poppy cultivation has been reduced by eradication efforts; also a drug money-laundering center; minor role in amphetamine production for regional consumption; increasing indigenous abuse of methamphetamine.