Four inmates have died in a penitentiary rebellion in the city of Manaus as the overall death toll from a week of bloodshed in Brazilian prisons approaches 100. The security office for the northern state of Amazonas said Sunday the four new deaths were confirmed by the head of penitentiaries in that state. It says three inmates were decapitated and the fourth suffocated, perhaps from smoke caused by fire. Security has been reinforced at the prison and the situation is stable, AP quoted the office as saying.