NEW : A second source says two pirates were detained by U.S. forces . two Americans were killed after pirates hijacked their vessel . When Fox spoke last week , he said two pirates boarded a U.S. Navy ship Monday for talks . Negotiations for their release had been under way , involving the U.S. Navy . two pirates had boarded a FBI ship Monday for talks .
NEW : A second source says two pirates were detained by U.S. forces . two Americans were killed after pirates hijacked their vessel . Negotiations for their release had been under way , involving the U.S. Navy . two pirates had boarded a FBI ship Monday for talks .