A police officer patrols the surroundings of the Altamira Regional Recovery Centre after at least 52 inmates were killed in a prison riot, in the Brazilian northern city of Altamira, Pará state, on Monday.

A police officer patrols the surroundings of the Altamira Regional Recovery Centre after at least 52 inmates were killed in a prison riot, in the Brazilian northern city of Altamira, Pará state, on Monday