At least 56 inmates killed in prison riot in northern Brazil

An attack by members of one crime gang on rival inmates touched off a riot at a prison in the northern state of Amazonas, leaving at least 56 dead, including several who were beheaded or dismembered in the worst bloodshed at a Brazilian prison since 1992.

Authorities said the riot that raged from Sunday afternoon into Monday morning grew out of a fight between two of the country's biggest crime gangs over control of prisons and drug routes in northern Brazil.