Belgium-based minerals merchant Traxys will stop purchasing tin ore from violence-ravaged eastern Democratic Republic of Congo in response to pressure from the United Nations, a company official said on Monday. The minerals trade has long been a key source of revenue for illegal armed groups in the east, including the Rwandan Hutu Democratic Forces for the Liberation of Rwanda (FDLR), composed in part of fighters responsible for Rwanda's 1994 genocide. Traxys' decision to pull out of eastern Congo comes amid growing pressure from the United Nations and rights groups to clean up that trade. [also refers to ArcelorMittal]