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

A Chinese foreign ministry spokesperson on Sunday said China will maintain its fair and impartial position and continue close communication with Cambodia and Thailand, actively facilitate talks for peace and play a constructive role for a ceasefire.

The leaders of Cambodia and Thailand have agreed to meet to negotiate a ceasefire, according to a social media post by United States President Donald Trump on Saturday.

Thai and Cambodian leaders are set for talks Monday to halt the deadliest clash between the neighbors in more than a decade, with the US sending mediators after President Donald Trump used tariffs threats to press for a ceasefire.

U.S. President Donald Trump said on Monday that he had instructed his trade team to resume negotiations on trade with Thailand and Cambodia after the two nations agreed to a ceasefire. "Just spoke to the Acting Prime Minister of Thailand and Prime Minister of Cambodia,