Twelve people, mostly civilians, were killed following a violent clash between Thai and Cambodian military forces at a long-disputed border area, Thai authorities confirmed.
Conflicting accounts have emerged over how the fighting began.
Thailand accuses Cambodia of launching rocket attacks, while Phnom Penh alleges that Bangkok carried out airstrikes on Cambodian military positions.
Both nations have begun evacuating citizens near the border.
Thailand has already relocated around 40,000 residents from the affected areas.
The conflict stems from a century-old territorial dispute, which remains unresolved.
Current political instability in both countries is hampering efforts to de-escalate the situation.
