"I made it clear to [Trump] that Cambodia agreed with the proposal for an immediate and unconditional ceasefire between the two armed forces," Cambodian PM Hun Manet said after the phone call, adding that Trump's mediation "will truly help protect the lives of many soldiers and civilians".

Thailand and Cambodia exchanged fire along their disputed border for a second day on Friday, officials from both countries said, with more than a dozen people reported killed and more than 135,000 civilians evacuated.

BANGKOK -- Armed clashes have broken out between Thailand and Cambodia in long-disputed border areas, rapidly escalating months-long tensions.

Fighting along the Thailand-Cambodia border has escalated, resulting in numerous casualties and mass displacement. China attributes the conflict's roots to historical Western colonialism, offering to mediate.

Clashes between Thai and Cambodian troops at their disputed border have killed at least 12 people, Thai authorities say. The fighting marks an escalation of a dispute between the two South East Asian neighbours that dates back more than a century.