Monday 8 December 2025 — Bangkok / Phnom Penh — Updated: 10:35 IST
Thailand has launched airstrikes on Cambodian positions along their disputed border after deadly clashes, plunging a fragile US-backed ceasefire into crisis and forcing thousands of civilians to flee frontline villages.
Key points at a glance
- The Royal Thai Army says it has carried out airstrikes along the disputed border with Cambodia after Cambodian shelling killed a Thai soldier and wounded others in the Nam Yuen area of Ubon Ratchathani.
- The clashes threaten to unravel a ceasefire and peace plan brokered in October and backed by the United States and Malaysia.
- Both governments accuse the other of firing first, as reports emerge of BM-21 rocket attacks and heavy artillery hitting areas close to civilian communities.
- Authorities on the Thai side say hundreds of thousands of residents have either been evacuated or told to be ready to leave border districts if fighting intensifies.
- Regional bloc ASEAN is under pressure to step in as fears grow that the 2025 Cambodian–Thai border crisis could slide back into full-scale war.
How did the latest Thailand–Cambodia clashes start?
According to Thai military officials, fighting flared before dawn on Monday when Cambodian forces allegedly fired shells and rockets into Thai territory near the Chong Bok area of Nam Yuen district in Ubon Ratchathani province, killing one Thai soldier and injuring several others stationed along the frontier. Thailand says it responded by launching airstrikes on what it describes as Cambodian military positions and command posts just across the border.
Cambodian officials reject the accusation and insist Thai forces attacked first, describing Bangkok’s decision to deploy fighter jets as an “act of aggression” that violates the latest truce between the two neighbours.
The incident marks the most serious escalation since a five-day conflict in July left dozens dead and more than 300,000 people displaced on both sides of the frontier, before a ceasefire and monitoring mechanism were hammered out under the Kuala Lumpur Peace Accord.
A fragile Trump-backed ceasefire now in ruins
The latest air campaign comes barely six weeks after Thailand and Cambodia signed a peace plan in the Malaysian capital, witnessed by ASEAN leaders and former US president Donald Trump, whose administration had pushed for a ceasefire following July’s fighting.
That truce was already under strain. Thai authorities suspended parts of the agreement in November after a Thai soldier lost his foot in a landmine blast that Bangkok blamed on Cambodian forces. Since then, both sides have traded accusations of minor ceasefire violations, sporadic gunfire and propaganda campaigns along the front.
Monday’s airstrikes signal a decisive break with that arrangement, raising the risk that the 2025 Cambodian–Thai border crisis will enter a new, more dangerous phase unless urgent diplomacy succeeds.
Where are the airstrikes and clashes happening?
The current flashpoints run along heavily forested and mountainous stretches of the border, including parts of Thailand’s Ubon Ratchathani, Si Sa Ket and Surin provinces and neighbouring Cambodian provinces such as Preah Vihear and Oddar Meanchey. These areas sit close to long-disputed temple complexes and ridge lines first demarcated under French colonial rule — boundaries that have fuelled nationalist sentiment in both countries for decades.
Thai officials say the latest air raids have targeted artillery batteries, rocket launch sites and field headquarters believed to be operated by Cambodian forces just inside Cambodian territory. Cambodian sources, meanwhile, allege that Thai aircraft and artillery have struck villages and farmland, though those claims have not been independently verified.
Access for journalists and humanitarian agencies remains tightly controlled, making it difficult to confirm casualty numbers on either side.
Civilians ordered to evacuate as rockets fall near homes
Local authorities in Thai border provinces have ordered evacuations from high-risk zones and opened temporary shelters in schools and municipal buildings. Earlier rounds of fighting in 2025 forced hundreds of thousands of people from their homes; officials fear a similar exodus if rocket and artillery fire continues.
Residents in several Cambodian border districts have also been filmed fleeing in pickup trucks and on motorcycles, carrying children and bundles of belongings as explosions echo in the background. Aid agencies warn that many families displaced during the July clashes have only recently returned home and are once again facing uncertainty as dry-season planting begins.
Both governments insist they are not deliberately targeting civilians, but rights groups are already calling for independent monitoring amid reports of BM-21 multiple rocket launchers and heavy artillery being used close to populated areas.
What is behind the 2025 Cambodian–Thai border crisis?
The latest flare-up is part of a much longer dispute over how the border between Thailand and Cambodia should be drawn, especially around hilltop temples and resource-rich highlands. The disagreement has periodically turned violent since the 2000s, but the 2025 crisis has been the bloodiest confrontation in more than a decade.
Nationalist rhetoric in both countries, domestic political pressures in Bangkok and Phnom Penh and the presence of landmines and unexploded ordnance from earlier conflicts have all contributed to the risk of miscalculation. Even when ceasefires hold, sporadic incidents — such as the recent landmine blast that injured Thai troops on patrol — can quickly reignite tensions.
Regional analysts say the renewed airstrikes underline the limits of ad-hoc truce deals and point to the need for a more durable settlement, potentially involving international arbitration on contested sectors of the frontier.
Can ASEAN and the wider world stop the fighting?
Diplomats from across Southeast Asia are urging restraint. Malaysia, which helped host the October peace talks, has called for an immediate halt to hostilities and for both sides to respect the Kuala Lumpur accord. UN officials and Western governments are monitoring the situation closely, concerned that prolonged instability along the Thai–Cambodian frontier could disrupt trade routes, energy projects and tourism across mainland Southeast Asia.
Analysts say Washington and Beijing both have an interest in preventing another protracted conflict in the region, though it remains unclear how far either will go to exert pressure on Bangkok or Phnom Penh. For now, international actors are publicly backing ASEAN’s efforts while quietly urging both governments to pull back from the brink.
What happens next for Thailand, Cambodia and the region?
Whether Monday’s airstrikes mark the start of a wider campaign or a short, sharp response will depend on what happens in the coming hours and days. If shelling and rocket fire continue, Thai commanders may feel compelled to intensify operations, risking counter-attacks and potential strikes on critical infrastructure or border towns.
For ordinary people living in the shadow of the frontier, the priorities are simpler: safety, shelter and clear information. Local officials on both sides are urging residents to follow evacuation orders, keep radios and phones charged and avoid unexploded ordnance left behind by previous rounds of fighting.
The hope now is that emergency diplomacy can restore calm before the 2025 Cambodian–Thai border crisis spirals into a conflict neither country can afford.
More on the story
For live official statements and verified updates, readers can follow Reuters’ coverage of the airstrikes and regional reporting on the border clashes.
For background on how the dispute evolved through 2025, see this overview of the 2025 Cambodian–Thai border crisis.
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Written by: Swikblog News Desk
