Thailand's army said three soldiers were injured in a landmine blast near its disputed border with Cambodia, threatening a fragile ceasefire agreement between the two neighbors.

Top defence officials of Thailand and Cambodia began talks in Malaysia on Monday to hold the ceasefire on the border, a week after the worst fighting broke out between the two Southeast Asian countries in decades.

Cambodia and Thailand's top defence officials began a meeting in Malaysia on Thursday to finalise a permanent end to hostilities following a violent five-day border conflict that ended in an unconditional ceasefire late in July.