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

The leaders of Thailand and Cambodia are visiting different parts of their disputed land border on Thursday as tensions between the two neighbours simmer over a territorial dispute and the Thai government teeters on the brink of collapse.

Dozens of tourists and workers, some carrying children, were left stranded on Tuesday at Thailand's main land crossing with Cambodia, after the army stopped almost all border traffic in an