Tension has been rising between Thailand and Cambodia following the killing of a Cambodian soldier on May 28 during a brief exchange of gunfire at a disputed border area between the two Southeast Asian neighbours.

BANGKOK (Reuters) -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.