Detainees at the notorious Florida immigration jail known as “Alligator Alcatraz” were shackled inside a 2ft high metal cage and left outside without water for up to a day at a time, a shocking report published Thursday by Amnesty International alleges.

The human rights group said migrants held at the state-run Everglades facility, and at Miami’s Krome immigration processing center operated by a private company on behalf of the Trump administration, continue to be exposed to “cruel, inhuman and degrading treatment” rising in some cases to torture.

The cage, known to detainees as “the box”, is used by guards for the arbitrary punishment of trivial or non-existent offenses, according to the report compiled from interviews with detainees and advocacy groups, and a site visit to Krome made

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