Cambodia and Thailand exchanged fire across their disputed border for a fourth day on Sunday, hours after US President Donald Trump announced the two Southeast Asian nations had agreed to ceasefire talks and threatened continued fighting would jeopardize their trade deals with Washington.

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

The latest flare-up started on Thursday, with intense fighting spreading across multiple border areas. Early Saturday, Thailand’s navy joined the army in repelling what it described as incursions by Cambodian troops at three points in eastern Trat province.

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.

I am calling the Acting Prime Minister of Thailand, right now, to likewise request a Ceasefire, and END to the War, which is currently raging,” Trump wrote on Truth Social on Saturday The US is currently engaged in trade negotiations with both nations,

From Trump’s tariff-fueled ceasefire push in Southeast Asia to political deadlock in Taiwan, a deadly courthouse siege in Iran, and the massacre of Christians in Nigeria’s Plateau State, the world feels like it’s teetering on a knife’s edge—and the blade’s getting sharper.

Tensions have bubbled between the two neighbors for months, flaring on Thursday as Cambodia and Thailand exchanged fire.

Both sides have accused each other of firing the first shot as border tensions between the two South East Asian neighbours heat up.