The US said today it had transferred five detainees from the military prison at Guantanamo Bay, Cuba, to Afghanistan. A written statement from the Pentagon did not say why the detainees were "released" and did not disclose their identity or home country.In earlier releases, the military has said detainees were freed because they no longer were considered enemy combatants. The Pentagon said the latest releases came after "multiple review processes" at Guantanamo. In all, 315 detainees have been sent from Guantanamo to other governments, including Australia, Denmark, France, Germany, Spain and Britain.