At least 60 inmates have been killed, many of them decapitated, in a prison riot in the Amazon jungle city of Manaus, officials said on Monday, in one of the worst incidents of jail violence in years in Brazil.
The 17-hour riot broke out on Sunday afternoon and lasted through the night at a prison on the outskirts of Manaus, the capital of Amazonas state, Sergio Fontes, the public security secretary of the state, said.
"This is the biggest prison massacre in our state's history," Fontes said.
"Many (victims) were decapitated, and they all suffered a lot of violence," he told a press conference.
Two of the biggest crime gangs of Brazil began fighting last year over control of several prisons, and authorities in Amazonas believe that's the reason behind the first riot of 2017.