Twenty-one Army Reserve soldiers from O'ahu will be mobilized tomorrow for duty at Guantanamo Bay, Cuba, a U.S. base where prisoners in the war on terror are kept.

The Hawai'i soldiers are members of the 305th Press Camp Headquarters, a public affairs unit assigned to the 9th Regional Readiness Command at Fort Shafter.

The soldiers' mission will be to provide public affairs support for Joint Task Force Guantanamo and to assist national and international news media reporting on operations and activities, the Army Reserve said.

The 305th will be mobilized for 18 months, and is expected to depart for Guantanamo early next month.

A United Nations report released yesterday said photographic evidence and testimony of former prisoners showed detainees at Guantanamo were shackled, chained, hooded and beaten if they resisted.

The report said the United States should shut down the prison and either release the detainees or put them on trial.

A White House spokesman said that a U.N. team looking into the issue did not even visit Guantanamo, that the detainees are "dangerous terrorists," and that the military treats detainees humanely.