Thailand’s government announced a suspension of its peace-deal implementation with Cambodia on Monday after a land-mine explosion injured two Thai soldiers in Sisaket province.

The move puts at risk a ceasefire brokered last month under the aegis of President Donald Trump and Malaysia.

The soldiers were injured in a blast presumed to be caused by a fresh mine they stepped on while patrolling near the Thai-Cambodian border.

One lost his right foot, while the other sustained chest trauma.

The Thai army contends the mine was newly planted after barbed-wire defences were removed.

Cambodia strongly denies mining new territory.

Prime Minister Anutin Charnvirakul declared that all activities under the bilateral agreement would “stop” until Cambodia demonstrates genuine goodwill and clarity over the incident.

He said that hostilities thought to have been ended “had not gone anywhere.” Thailand’s military chief added that agreements would be frozen until Cambodia offers proof of sincerity.

The truce, signed earlier this year after a week of heavy fighting that killed dozens of people and displaced hundreds of thousands, included obligations for both sides to remove heavy weapons, clear explosives and restore diplomatic ties.

It was viewed as a key achievement of Trump-mediated diplomacy in Southeast Asia.

Cambodia’s foreign ministry expressed deep concern over Thailand’s decision to halt the deal and urged Bangkok to resume implementation while investigations proceed.

Fears are growing that the collapse of the accord could reignite one of the region’s most serious border conflicts in recent years.

As of now, Thailand is pausing all provisions of the agreement and warns that resumption hinges on Cambodia’s transparent action and an end to what it calls “hostile acts” near the frontier.