"We nonetheless take our social responsibilities as a global company very seriously and expect our production partners to do the same," the statement said.
The Enough Project said that it wanted the companies to know more about the origins of the minerals they were buying, but not to avoid buying from the country altogether.
"A handful of companies are helping Congo develop a clean trade, but some companies are taking a hands-off approach to instruct their suppliers to not buy minerals from Congo and the region," the group said. "This approach helps cut off armed groups but leaves mining communities in Congo behind."
___Associated Press writer Michelle Faul in Johannesburg and AP Technology Writer Peter Svensson in New York contributed to this report.
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