GENEVA (AP) — The United Nations' top human rights official is pressing the U.S. to close the Guantanamo Bay prison.

President Barack Obama pledged to shutter the prison soon after taking office but Congress opposed it, passing a law that prohibits the government from transferring Guantanamo prisoners to U.S. soil and requiring security guarantees before they can be sent elsewhere.

U.N. human rights chief Navi Pillay said Friday she's "deeply disappointed" Washington hasn't closed the facility.

Pillay, who has long urged Guantanamo's closure, said in a statement: "The continuing indefinite incarceration of many of the detainees amounts to arbitrary detention and is in clear breach of international law."

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