Thailand's military said it is ready to launch a "high-level operation" to counter any violation of its sovereignty, in the strongest words yet in a simmering border dispute with Cambodia that re-erupted with a deadly clash last week.

Thailand’s armed forces are ready to defend the border in the face of a deadly clash with Cambodia that erupted last week, a top official said, adding that the country wants to maintain peace with its neighbor.

Cambodia’s government says it plans to seek a ruling from the U.N.’s International Court of Justice over violent border disputes with Thailand.