The Pentagon separately said it had issued new guidelines for transferring new detainees to the military facility, which is part of a U.S. naval base in Cuba. It didn’t say how the updated policy would affect enemy combatants currently held abroad.
In January, Mr. Trump signed an executive order to keep Guantanamo Bay operating, reversing a 2009 order by his predecessor to close the facility. Its operating costs are about $400 million a year. Mr. Trump said at the time that keeping it open would prevent the release of suspected terrorists back to the battlefield.