President Donald Trump said Saturday that Cambodia’s prime minister and the acting prime minister of Thailand had agreed to meet immediately and quickly work out a ceasefire as he sought to end the conflict between the two Southeast Asian neighbors,

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.

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.

The countries continued to trade fire on Friday, and at least 16 people are reported to have been killed.

Of course, trouble at the 508-mile (817 km) shared border is nothing new. For over a century, Thailand and Cambodia have contested sovereignty at various undemarcated points in the thick jungle punctuated with culturally-significant temples albeit with scant strategic or economic value.

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.

More than 100,000 people have been displaced in the deadliest conflict between the two nations in 14 years. Thailand’s acting prime minister warned on Friday that clashes with Cambodia over a border dispute “could develop into war” as the deadliest fighting between the two countries in years extended into a second day.

Thai men's top seed Kunlavut Vitidsarn swept aside Malaysian Leong Jun Hao with a 23-21 21-7 win to march into the quarter-finals of the China Open on Thursday, while women's top seed An Se-young beat Sim Yu-jin 21-13 21-15 in an all-South Korean clash.