Armed clashes between Thailand and Cambodia continued on Wednesday in defiance of calls from the United States to stop fighting and adhere to a months-old Trump-backed peace deal that now looks on the brink of complete collapse.

Cambodia says Thailand has launched more airstrikes as heavy fighting flares along their border. Both countries accuse each other of violating sovereignty.

The escalation broke the ceasefire brokered in July by Trump who threatened to halt trade talks with the two countries unless they ended the fight.