Cambodia’s powerful former leader Hun Sen and Thailand’s prime minister have made separate visits to border areas.

Thailand's prime minister and Cambodia's influential former premier are visiting different parts of their disputed land border on Thursday as tensions simmer between the two neighbours over a territorial dispute and the Thai government teeters on the brink of collapse.

Thailand has imposed restrictions on all travellers heading into Cambodia, as the two countries remain locked in a bitter border dispute. The ban applies to any vehicle or person trying to cross into Cambodia from checkpoints across several Thai provinces,