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.

Cambodia and Thailand will meet in Malaysia later today for peace talks after days of deadly clashes on their disputed border have sent civilians scrambling for safety and relations between the two neighbours cratering.

"The U.S. already flunked the test and that should be a wakeup call," a former senior U.S. State Department official told Newsweek.

At least eight civilians were killed in attacks in a disputed border area between Cambodia and Thailand on Thursday, according to authorities. Thailand said Cambodian soldiers opened fire on a military base in Surin.