Thailand’s Foreign Ministry confirmed Trump’s call with acting Prime Minister Phumtham Wechayachai. “However, Thailand would like to see sincere intention from the Cambodian side,” it said. The ministry reiterated its call for bilateral talks between the two sides.

President Trump said on Saturday that both countries had agreed to a halt in the fighting. But on Sunday morning, skirmishes erupted once more.

Thailand and Cambodia exchanged heavy artillery fire for a second day on Friday as fighting intensified and spread, while Cambodia's leader said Thailand had agreed to a Malaysian ceasefire proposal but then backed down.