Trump announced the agreement to restart the ceasefire in a social media posting following calls with Thai Prime Minister Anutin Charnvirakul and Cambodian Prime Minister Hun Manet.

Thailand launched air strikes on Cambodian military sites Monday after a deadly border skirmish, the most dramatic escalation in months that endangers a peace deal demanded by President Donald Trump.

The fighting comes only six weeks after Trump, along with Malaysian leader Anwar Ibrahim, oversaw the signing of the ceasefire deal at a summit of the Association of Southeast Asian Nations (ASEAN) in Kuala Lumpur, in which the U.S. president was thanked for his role.