Both countries' foreign ministers agreed that no other country should be involved in the issue, Mohamad Hasan said.

"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 are set to hold talks Monday to discuss an end to their deadly border clashes after US President Donald Trump warned Washington wouldn’t make a trade deal with either country while the conflict continued.