A U.N. report on the illicit drug trade says political instability in military-ruled Burma has helped make it the major source of methamphetamine pills in the region.

The United Nations Office on Drugs and Crime said in a report issued Thursday in Bangkok that amphetamine-type stimulants have become the top illicit drug threat in several East and Southeast Asian countries, supplanting heroin, opium or marijuana.

Burma’s border areas are under loose central control, which let them become a major source for opium and its derivative, heroin. In the past decade, the area has become a source for methamphetamine production.

The report says a Burma government effort to reassert authority may have pushed traffickers to relocate their labs in neighboring countries.

Associated Press