A military judge has agreed to postpone the next round of hearings in the Sept. 11 case at Guantanamo after thousands of defense emails were turned over to the prosecution in an apparent mistake.

Army Col. Judge James Pohl agreed to postpone next week's hearings at the U.S. base in Cuba until June.

Defense lawyers said computer technicians may have compromised their case by mistakenly turning over more than 500,000 of their emails to prosecutors. A Pentagon computer crash also resulted in the loss of a large amount of data.

The Pentagon said prosecutors did not read the defense's emails. The death penalty case for the five Guantanamo prisoners charged in the Sept. 11 case has been repeatedly delayed and the trial is likely at least a year away.