Thailand and Cambodia's leaders agreed to an "unconditional" ceasefire Monday, after five days of combat along their jungle-clad frontier that has killed at least 36 people.
More than 200,000 people have fled as the two sides fired artillery, rockets and guns in a battle over the long-disputed area, which is home to a smattering of ancient temples.
The flare-up was the deadliest since violence raged sporadically from 2008-2011 over the territory, claimed by both sides because of a vague demarcation made by Cambodia's French colonial administrators in 1907.
Reading a joint statement from the leaders of both countries after peace talks, Malaysian Prime Minister Anwar Ibrahim said they had agreed "an immediate and unconditional ceasefire" with effect from midnight Monday (1700 GMT).
"This is a vital first step towards de-escalation and the restoration of peace and security," he said at a press conference in Malaysia's administrative capital Putrajaya, flanked by Thai acting Prime Minister Phumtham Wechayachai and Cambodia's Prime Minister Hun Manet.
Anwar said a meeting of military commanders from both sides would take place on Tuesday morning, before the countries' cross-border committee would meet in Cambodia on August 4.
As the deal was being announced, an AFP journalist in the Cambodian city of Samraong -- 17 kilometres (10 miles) from the fraught frontier -- reported hearing continuing artillery blasts.
'Very good results'
US President Donald Trump -- who both nations are courting for trade deals to avert the threat of eye-watering tariffs -- intervened over the weekend, and said both sides had agreed to "quickly work out" a truce.
"Today we had a very good meeting and very good results," said Cambodia's Hun Manet, thanking Trump for his "decisive" support and saying the truce would serve as "a foundation for future de-escalation".
Ahead of the summit, Thailand and Cambodia had traded fresh fire and barbed accusations.
Cambodia's defence ministry spokeswoman Maly Socheata said it was "the fifth day that Thailand has invaded Cambodia's territory with heavy weapons and with the deployment of a lot of troops".
And as he departed Bangkok airport, Phumtham told reporters he did not believe Cambodia was "acting in good faith".
After the talks hosted by Anwar -- chair of the ASEAN bloc of which both Thailand and Cambodia are members -- Phumtham called for the truce to be "carried out in good faith by both sides".
"Thailand decides for peaceful resolution, while continuing to protect our sovereignty and the lives of our people," he said.
'Highly tense'
On the eve of the talks, Thailand's military said Cambodian snipers were camped in one of the contested temples, and accused Phnom Penh of surging troops along the border and hammering Thai territory with rockets.
It said there was fighting at seven areas in the rural region, marked by a ridge of hills surrounded by wild jungle and fields where locals farm rubber and rice.
"The situation remains highly tense, and it is anticipated that Cambodia may be preparing for a major military operation prior to entering negotiations," the Thai military statement read.
Thai King Maha Vajiralongkorn marked his 73rd birthday on Monday, but a notice in the country's Royal Gazette said his public celebrations scheduled for Bangkok's Grand Palace had been cancelled amid the strife.
Trump has threatened both countries with high levies in his global tariff blitz unless they agree to independent trade deals -- but said he would "look forward" to signing them once "peace is at hand".
Each side had already agreed to a truce in principle, while accusing the other of undermining peace efforts and trading allegations about the use of cluster bombs and targeting of hospitals.
Nationalist sentiment
Thailand says nine of its soldiers and 14 civilians have been killed, while Cambodia has confirmed eight civilian and five military deaths.
The Thai military said it had returned the bodies of 12 Cambodian soldiers killed in combat.
More than 138,000 people have fled Thailand's border regions, while around 140,000 have been driven from their homes in Cambodia.
With the skirmish enflaming nationalist sentiments, Thailand warned its citizens to "refrain from any kind of violence, whether in speech or action" against Cambodian migrants living in the country.
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