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

Thai acting Prime Minister Phumtham Wechayachai and Cambodia's Prime Minister Hun Manet began ceasefire talks in Malaysia around 3:15pm local time (0715 GMT).

Despite both the US and China urging a ceasefire, Thailand’s acting prime minister says he’s wary of Cambodia’s ‘acting in good faith’.

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.

Thailand is a major non-NATO ally of the U.S., while Cambodia is one of China's closest regional allies. The two countries began fighting after a recent dispute over landmines erupted into exchanges of fire on Thursday, July 24, with each side accusing the other of initiating the current hostilities.

China, Malaysia, and Japan expressed concerns over the Thailand-Cambodia border conflict, which has resulted in civilian casualties.

Thailand bombed Cambodia with F-16 fighter jets on Thursday, as relations between the two countries imploded following clashes on a disputed border near the Emerald Triangle.

A Thai F-16 fighter jet bombed targets in Cambodia, both sides said, as weeks of tension over a border dispute escalated into clashes on Thursday that have killed at least 12 people, including 11 civilians.