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.

Thailand has imposed restrictions on citizens and tourists heading into Cambodia via land, as the two countries remain locked in a bitter border dispute. The measures apply to vehicles or people trying to cross into Cambodia through checkpoints from several Thai provinces.

The Thai military closed its border to nearly all travelers to Cambodia as diplomatic tensions rise over a territory dispute between the two neighboring south Asian nations.