Thailand has imposed severe restrictions along its 817km border with Cambodia as both sides continue to deploy troops around the Emerald Triangle while talks have yielded little results as Phnom Penh pushes the dispute into an international court.

Cambodia's Defence Ministry confirmed on Sunday that Thailand and Cambodia had agreed to return their troops to previous border positions after a clash in which a Cambodian soldier was killed prompted both to reinforce their military presence.

Thailand shortened operating hours at 10 border crossings with Cambodia, citing security concerns, as tensions between the two countries simmered after a deadly clash last month. A day earlier, both the Southeast Asian countries reinforced their military presence along disputed border areas,