Thailand's military has closed border crossings into Cambodia to almost all travellers, including tourists and traders, citing security concerns as tensions between the two Southeast Asian neighbours remain escalated over a simmering border dispute.

Border markets are on the brink of collapse as Thailand closed all crossings to Cambodia due to a bitter territorial clash. Dozens of shops in Trat province which rely on trade from workers continually passing through have shut down amid a sharp decline after the Thai military sealed the border.

At the usually bustling border crossing of Poipet between Thailand and Cambodia, tuk-tuk driver San Noeun now has to work overnight to make ends meet.