The joint statement outlines the terms of “de-escalation”, which includes ceasing “attacks on civilians, civilian objects and infrastructures, and military objectives of either side”.
“Both sides must avoid unprovoked firing or advancement or movement of troops towards the other side’s positions or troops,” the statement said.
The statement also said that the release of the 18 Cambodian soldiers held by Thailand would be conducted “in the spirit of the Kuala Lumpur Declaration”, an agreement between the two countries signed at a ceremony attended by US President Donald Trump in October.
That ceasefire agreement was broken earlier this month, when fresh clashes erupted.
Both sides have since blamed each other for the breakdown of the truce.
The Thai army said its troops had responded to Cambodian fire in Thailand’s Ubon Ratchathani Province, and a Thai solider had been killed.
Cambodia’s defence ministry said it was Thai forces that had attacked first, in Preah Vihear province, and insisted that Cambodia did not retaliate.
Clashes have continued throughout December. On Friday, Thailand carried out air strikes on a disputed border region in Cambodia.
The Thai Air Force said it had hit a Cambodian “fortified military position” after civilians had left the area. Cambodia’s defence ministry said the strikes were “indiscriminate attacks” against civilian houses.