Thailand began imposing land border restrictions Monday including blocking tourists heading into Cambodia as the two countries engage in retaliation in their border dispute. Relations between the countries have deteriorated following an armed confrontation May 28 in which one Cambodian soldier was killed in a relatively small,

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.

Thailand and Cambodia shut several border crossings in tit-for-tat moves, ratcheting up tensions between the two Southeast Asian neighbors as Prime Minister Paetongtarn Shinawatra fights to save her government from a political crisis triggered by a leaked phone call over the weekslong standoff.