Thai and Cambodian soldiers have clashed in several areas along their border in a major escalation of a festering dispute over territory.

In a landmark advisory opinion issued on Wednesday, the world’s highest court said polluting countries may be in breach of international law if they do not protect the planet from the “existential threat” posed by climate change. It was the first time the International Court of Justice had formally addressed the climate crisis.

Both countries lay claim to centuries-old worship sites perched on the mountains that divide the two nations, sometimes stoking nationalistic fervor.

BANGKOK -- Border tensions between Thailand and Cambodia have escalated significantly with their armies exchanging fire on Thursday, leaving 11 civilians dead in Thailand. Cambodian Prime Minister Hun Manet has appealed to the United Nations Security ...

Shots were fired as Thai and Cambodian forces clashed on Thursday in a disputed area of their border, according to military officials, a day after a Thai soldier lost his leg in a landmine explosion.