President Donald Trump has urged Thailand and Cambodia to fully honour ceasefire commitments following renewed fighting along their disputed border, warning that any party undermining peace efforts would be held accountable.

A White House spokeswoman said on Saturday that President Trump expects all sides to respect the agreements they have entered into and that he remains prepared to take necessary steps to stop the killing and secure a durable peace.

The renewed intervention from Washington came as tensions escalated after Thailand’s leadership publicly vowed to continue military operations despite U.S.-led efforts to halt hostilities.

The dispute intensified when Thailand carried out air strikes along the border just hours after President Trump said he had brokered a fresh ceasefire.

Caretaker Thai Prime Minister Anutin Charnvirakul said Thailand would “continue to perform military actions until we feel no more harm and threats to our land and people,” signalling that Bangkok did not recognize any immediate truce.

President Trump said he spoke by telephone on Friday with both Anutin and Cambodian Prime Minister Hun Manet, adding that both leaders had agreed to “cease all shooting”.

However, neither government referred publicly to such an agreement afterward.

Anutin explicitly denied that a ceasefire existed, writing on social media that Thailand’s actions on the ground made its position clear.

Cambodia’s prime minister took a different tone on Saturday, saying he welcomed a proposal from Malaysian Prime Minister Anwar Ibrahim to halt hostilities from Saturday evening.

Anwar, who is serving as chair of the Association of Southeast Asian Nations, urged both sides to refrain from further military action, including the use of force or forward movement of armed units.

Anwar also announced that an ASEAN observer team led by Malaysia’s chief of defence forces would be deployed to the border and that the United States government would provide satellite monitoring capabilities to support de-escalation efforts.

Thailand’s foreign minister said Bangkok would cooperate with the observer mission but insisted that talks must precede any formal ceasefire.

“We can’t just announce a ceasefire while the fighting is going on,” he said.

Despite diplomatic activity, Anutin told reporters there was “no agreement on halting anything” when asked about Malaysia’s proposal.

Heavy weapons fire has continued at multiple points along the eight hundred seventeen kilometre border since Monday, marking some of the most intense clashes since a five-day confrontation in July.

President Trump has said he previously helped halt that earlier round of fighting through direct calls to both leaders and has indicated his determination to intervene again to salvage a truce.

Thailand had suspended the earlier ceasefire last month after a Thai soldier was seriously injured by a landmine, one of several devices Bangkok claims were newly laid by Cambodian forces.

As diplomatic and military pressures unfold simultaneously, the situation remains volatile, with ceasefire language contested on the ground and regional and international actors working urgently to prevent further escalation.