The ceasefire agreement brokered in Putrajaya was a win for Malaysia premier Anwar Ibrahim and ASEAN, experts say. With clashes reportedly erupting early Tuesday morning, however, observation teams are urgently needed on the ground.

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.

Residents are hoping a shaky ceasefire between Thailand and Cambodia holds, after days of clashes over a territorial dispute.

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