Clarification: China-North Korea-Trade Investigation story

BEIJING (AP) — In a story Sept. 21 about China's investigation of a company accused of North Korea trade violations, The Associated Press reported that researchers at a South Korean think tank said in a report that the company supplied materials used in processing nuclear bomb fuel. The story should have noted that the report was also produced by C4ADS, a non-profit research group based in Washington, D.C.