The decision memo drafted by the Tribunal states it reached this conclusion based on classified evidence.

It said the detention was "not based on classified evidence."

The tribunal indicated that it would also hear classified evidence in a closed hearing.

Some details of the accusations were handled in closed sessions because they involved classified evidence.

The difficulty of introducing classified evidence in open court could also complicate the case, officials acknowledged.

Indeed, he said, the Government has abandoned similar proceedings in other cases to avoid disclosing classified evidence.

And there was one location they could travel to review classified evidence.

Administration officials strongly denied that any political considerations tainted their review of the classified evidence.

That case has been bogged down in court by legal challenges, including objections to the use of classified evidence.

It recorded that the Tribunal relied entirely on classified evidence.