One person was injured when military trucks hit landmines in Myanmar’s troubled Rakhine State this week, state media said on Friday, amid ethnic tension following an army crackdown that sent hundreds of thousands of Rohingya Muslims fleeing.

Kanal24 reports citing Reuters that, more than 600,000 of the refugees have entered neighboring Bangladesh since Aug. 25 attacks by Rohingya militants sparked the army operation. Killings, arson and rape carried out by troops and ethnic Rakhine Buddhist mobs since then amount to ethnic cleansing of the Rohingya, the United Nations says.

Three landmine blasts caused extensive damage to three military trucks in Rakhine’s central Minbya township on Wednesday morning, the state-run Global New Light of Myanmar newspaper said.