Cambodia and Thailand agreed to an "immediate and unconditional ceasefire" from midnight (1700 GMT) on Monday, to try to halt their deadliest conflict in more than a decade after five days of fighting that displaced more than 300,

The State Department raised both advisories to Level 2 on July 25, citing the “risk of unrest” in Thailand and crime and landmines in Cambodia.

U.S.-backed talks to end the border war, in which militaries have killed dozens of people and displaced hundreds of thousands, began on Monday in Malaysia.

The Thai warning came as the U.S. expressed its grave concern about the most serious fighting in years between the Southeast Asian neighbors. The U.S. and China compete for influence in fast-growing Southeast Asia, and both have good relations with Thailand and Cambodia.

The leaders of Cambodia and Thailand agreed to a ceasefire in a bid to bring an end to their deadliest conflict in more than a decade.

Thailand warned its conflict with neighboring Cambodia could “potentially develop into a war” as troops used rockets and artillery to shell targets along their contested border for a second

Cambodia and Thailand agreed to an "immediate and unconditional ceasefire" from midnight (1700 GMT) on Monday, in a bid to halt their deadliest conflict in more than a decade after five days of fierce fighting that has displaced more than 300,