The United States and South Korea have concluded, after 15 months of investigation, that American soldiers killed “an unknown number” of refugees during the early days of the Korean War at No Gun Ri. President Clinton has refused to apologize and, instead, plans to express regret over South Korean civilian deaths at American hands in a statement later today, after the results of the investigation are officially released in Washington and in Seoul. A joint statement of mutual understanding says the investigations found no proof of direct orders to fire on civilians, but the report cites military documents that U.S. troops in the war zone at the time were operating under what it calls “guidelines on shooting refugees” to prevent them from crossing U.S. front lines.