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.

Thailand and Cambodia will hold talks in Malaysia to address a deadly border dispute spurred by recent hostilities. Prompted by U.S. intervention, both nations expressed tentative agreement to a ceasefire.