GENEVA - The United Nations' top human rights official called on US authorities on Friday to close down the Guantanamo prison camp, saying the indefinite imprisonment of many detainees without charge or trial violated international law.

Navi Pillay said the hunger strike being carried out by some inmates at the facility in southeastern Cuba was a "desperate act" but it was "scarcely surprising".

"We must be clear about this: the United States is in clear breach not just of its own commitments but also of international laws and standards that it is obliged to uphold," she said.

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