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 leaders of Thailand and Cambodia announced today that they have agreed to end the fighting that broke out on the countries’ border last week

Leaders of Thailand and Cambodia are scheduled to sit down in Malaysia for ceasefire talks on Monday, the Associated Press reported. Newsweek has reached out to the Cambodian and Thai foreign ministries for comment via email on Sunday.

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. Secretary of State Marco Rubio said State Department officials were in Malaysia to assist peace efforts as Cambodia and Thailand were scheduled to begin talks there on Monday in hopes for a ceasefire.

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.

Following four days of border clashes which have left over 30 people dead, US President Donald Trump has called for an immediate cessation to hostilities.View on euronews

Thailand's military force is ranked 25th in the world and third in the ASEAN region after Indonesia and Vietnam. Thailand has 360,000 active troops, including 115,000 enlisted soldiers. In addition, there are 240,000 reserve troops and paramilitary forces, bringing the total number of military personnel to over 600,000.

After calls by President Trump, the leaders of Cambodia and Thailand are set to meet in Malaysia on Monday to discuss a halt to the fighting.