A U.S. war crimes tribunal will determine whether the FBI acted inappropriately by trying to turn a member of the legal defense team into an informant, Reuters reports.
Attorneys for Guantanamo Bay inmates accused of orchestrating the Sept. 11, 2001, attacks plan to argue that the FBI created a conflict of interest.
The Guantanamo Bay military commission is to hear the defense motion today and Tuesday.
The defendants have been held since 2002 and 2003.
Reporters are monitoring the hearing through a closed-circuit TV in Maryland.