Eight more men have been ordered to stay at Guantanamo Bay (search).

An official at the U.S. Naval outpost says military review tribunals have decided the men were properly labeled "enemy combatants."

That brings the total number of detainees ordered by tribunals to stay there to 143. Hundreds more cases are either pending or haven't yet been heard.

The tribunals are intended to decide whether all 500 detainees are being properly held as enemy combatants — a designation affording them fewer legal protections than those held under the Geneva Conventions (search).

Human rights groups have complained that the tribunals are unfair since prisoners aren't allowed to have lawyers present.