Washington ? A military review of the cases against four terror suspects held at the U.S. Navy base at Guantanamo Bay, Cuba, has concluded they are classified properly as enemy combatants and will not be freed, the official overseeing the process said Friday.

The four were the first cases, of 21 reviewed thus far, to be decided. There is no appeal.

In a change of policy, the Pentagon stopped on Friday the release of detainees’ nationalities when their cases are heard. Nationalities, but not names, of the first 21 were released at their hearings, including five Thursday.

Lt. Cmdr. Beci Brenton, a spokeswoman for the review process, said the decision to stop providing nationalities was made after some countries objected to the release of that information.

Nationalities of those whose cases have been heard and decided — starting with the four announced on Friday — will be released afterward only if their home governments do not object, Brenton said.

Four additional cases were being heard Friday at Guantanamo Bay, raising the total to 25; their outcome was not expected to be known immediately.

The Pentagon has insisted since it began holding individuals captured in Afghanistan and elsewhere in the war on terror nearly three years ago that they are enemy combatants, not prisoners of war, and thus can be held indefinitely without being charged with a crime or allowed access to lawyers.

Human rights organizations have challenged the Pentagon on this, and Defense Secretary Donald H. Rumsfeld announced this year that each person held at Guantanamo Bay would have his case reviewed once a year to determine if he was a security threat to the United States.