Cambodian Defense Ministry spokesperson Lt. Gen. Maly Socheata accused Thai forces of escalating the violence with bombardment of Cambodian territory early Sunday, followed by a “large-scale incursion” involving tanks and ground troops in multiple areas.

Both countries' foreign ministers agreed that no other country should be involved in the issue, Mohamad Hasan said.

Cambodian Prime Minister Hun Manet and Thai Acting Prime Minister Phumtham Wechayachai are expected in Malaysia on Monday evening

Long-festering tensions over border territory have escalated into armed conflict between Cambodia and Thailand, leading to dozens of deaths on both sides and displacing tens of thousands of people.

Thailand and Cambodia exchanged heavy artillery fire for a third straight day on Saturday, as a border conflict that has killed at least 33 people and displaced more than 150,000 from their homes spread across the frontier.

The tank screeches as it rolls into the ad-hoc military base before four battle-weary soldiers jump out to re-inspect the hefty vehicle.

A fierce border conflict between Cambodia and Thailand has escalated, resulting in significant casualties and displacement. International concern has

Thailand and Cambodia exchanged heavy artillery fire for a second day on Friday as border fighting intensified and spread, while Cambodia's leader said Thailand had agreed to a Malaysian ceasefire proposal but then backed down.