Bangladesh’s government said Wednesday the Burmese military has begun planting land mines in the path of thousands of Rohingya Muslim refugees fleeing a brutal crackdown by Burmese authorities—which U.N. Secretary-General António Guterres has said could spiral into an ethnic cleansing campaign. CNN published photos showing an activist holding what appears to be a pair of anti-personnel land mines, and refugees reported one Rohingya boy had a leg blown off Tuesday after a mine exploded near a border crossing. Aid agencies say more than 120,000 Rohingya have fled into neighboring Bangladesh in recent days. This is Duniya Khan, spokesperson for the Office of the U.N. High Commissioner for Refugees.

Duniya Khan: “Some reported that their family members were burnt or shot or slashed to death. During their flight, many fled into the jungles or mountains, hiding and walking for days before they reached land or river and to cross the border. And some of them also told us that they’ve been walking for three days, and they didn’t have anything to eat, other than the rainwater or the water on grounds.”