Rio de Janeiro authorities launched a massive police raid against the Comando Vermelho criminal faction. The operation, named Operation Containment, resulted in widespread gun battles and a high death toll.

A day after the deadliest police operation in Brazil's history, the country is still piecing together details about the raids against a powerful drug gang in Rio de Janeiro's favelas.

Rio de Janeiro: At least 64 people, including four police officers, were killed in a large-scale security operation targeting organised crime in Rio de Janeiro on Tuesday (local time), CNN reported, citing officials. Authorities said the raid aimed to "combat the territorial expansion", Comando Vermelho (Red Command) criminal group.