Cambodia has previously denied breaking the truce, which came into effect on Tuesday after five days of violent clashes

Thailand has accused Cambodia of a “flagrant violation” of a truce to end cross-border fighting, claiming Cambodian troops launched an overnight attack on the frontier.

The neighbours agreed a ceasefire starting Tuesday after five days of clashes killed at least 43 people on both sides, as a longstanding dispute over contested border regions boiled over into open combat across the 800km frontier.