Three Thai soldiers were injured by a landmine while patrolling the border with Cambodia, the Royal Thai Armed Forces said, days after the two countries agreed to a detailed ceasefire following last month’s violent five-day conflict.

BANGKOK (AP) — Three Thai soldiers on patrol were wounded Saturday when one stepped on a land mine in territory along the border with Cambodia, Thailand’s army announced. The incident came just two days after the two countries reaffirmed their adherence to a ceasefire to end a brief armed conflict.

Thailand’s army said three soldiers were injured in a landmine blast near its disputed border with Cambodia, threatening a fragile ceasefire agreement between the two neighbors.