Migrants at a Miami immigration jail were shackled with their hands tied behind their backs and made to kneel to eat food from styrofoam plates “like dogs”, according to a report published on Monday into conditions at three overcrowded south Florida facilities. The incident at the downtown federal detention center is one of a succession of alleged abuses at Immigration and Customs Enforcement Agency (Ice) operated jails in the state since January, chronicled by advocacy groups Human Rights Watch