The updated U.S. travel advisory comes amid concerns over an escalation of a long-standing dispute between the two Southeast Asian neighbors who share a 500-mile land border—largely mapped by France when it ruled Cambodia for 90 years until 1953.

Seoul's Ministry of Foreign Affairs raised its travel advisory for parts of the Cambodia–Thailand border as clashes between the two countries intensified, implementing a "special" travel advisory urging Korean nationals to leave the area.

In its travel advice for Cambodia, the UK’s Foreign, Commonwealth & Development Office ( FCDO) has advised against all but essential travel within 50km from the border with Thailand in Oddar Meanchey and Preah Vihear provinces.

The Indian Embassy in Thailand has issued a travel advisory for Indian nationals. The advisory urges travelers to avoid certain provinces near the Thailand-Cambodia border due to security concerns.

India issues travel advisory for nationals in Cambodia as border clashes with Thailand escalate; UNSC holds emergency meeting.