Cambodia has accused Thailand of escalating border tensions by imposing new restrictions that have blocked almost all land crossings, especially for tourists heading into Cambodia.

More than 5,000 Cambodians are leaving Thailand every day for home as the military standoff in the Emerald Triangle continues to fester with Phnom Penh “permanently closing” two border posts and imposing a ban on all imports of Thai oil and gas.

The reescalation of conflict was sparked on May 28, when a Cambodian soldier was killed in an early morning clash between both nations’ troops, in an area called the Emerald Triangle—the shared border between Thailand, Cambodia, and Laos. The area remains disputed as both Thailand and Cambodia lay claims to parts of the region.