Jalaluddin Haqqani , son of Muhammad Haqqani , killed in Afghanistan , sources say . Islamabad , Pakistan ( CNN ) -- Pakistani network considered significant threat to U.S. forces in Pakistan . U.S. refuses to comment on drone strikes .
Jalaluddin Haqqani , son of Muhammad Haqqani , killed in Afghanistan , sources say . Pakistani network considered significant threat to U.S. forces in Pakistan . U.S. refuses to comment on drone strikes .