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 and Cambodia agreed to allow observers from Asean to inspect disputed border areas and prevent further hostilities.

This is the third time over the past few weeks that Thai soldiers have been injured due to landmine-related incidents along the border with Cambodia.