Armed clashes between Thailand and Cambodia entered a second day on Tuesday, both sides said, in defiance of calls from the United States to stop fighting and adhere to a months-old Trump-brokered peace deal that now looks on the brink of complete collapse.

Surin, Thailand — Renewed border fighting between Thailand and Cambodia showed no signs of abating Wednesday, leaving hundreds of thousands of displaced people in both countries living in strained conditions as more flooded into temporary shelters.

Secretary of State Marco Rubio said the U.S. is “concerned” about a war that his boss claimed to have ended weeks ago. The Cambodia-Thailand conflict is one of several global conflicts President Trump has repeatedly claimed he ended in his second presidency,

Thailand has launched air strikes along its disputed border with Cambodia, its military said, after both countries accused each other of breaching a ceasefire brokered by U.S. President Donald Trump.