NEW : China premier : ` The issue is controversial because of China 's opposition to the Uyghurs being sent to any country but China . ` Above all , this was a humanitarian act '' Uyghurs are native Chinese Muslims ; the detainees were apprehended in Pakistan . U.S. urges U.S. to hand over all 13 Uyghurs held at Guantanamo Bay , U.S. . Official says U.S. still negotiating with China to take remaining 13 Uyghurs .
NEW : China premier : `` Above all , this was a humanitarian act '' Uyghurs are native Chinese Muslims ; the detainees were apprehended in Pakistan . U.S. urges U.S. to hand over all 13 Uyghurs held at Guantanamo Bay , U.S. . Official says U.S. still negotiating with China to take remaining 13 Uyghurs .