Prosecutors in the Sept. 11 war crimes case at Guantanamo are seeking a mental competency evaluation for one of the defendants, adding a new delay to the long-stalled case.

The prosecution wants government doctors to determine if defendant Ramzi Binalshibh is competent to stand trial.

The judge agreed to the evaluation at a hearing at the U.S. base in Cuba on Thursday. The judge, Army Col. James Pohl, says the proceedings will be put on hold until the examination is completed.

Binalshibh has been ejected from pretrial hearing four times this week for refusing to stop speaking out in court about conditions in his cell.

He is one of five defendants facing charges that include terrorism and murder for their alleged role in the Sept. 11, 2001, terror attack.