No less than 64 civilians lost their lives in a law enforcement action against the organized crime group in the Brazilian city's northern districts - the biggest and most lethal operation in the Brazilian state's history.
Four police officers lost their lives during the security mission in the neighborhoods of Alemão and Penha, local authorities said. More than 80 individuals were detained.
Violent conflicts commenced when around 2,500 security personnel initiated the operation on Tuesday early hours. The Red Command countered with shooting, setting fire to barriers and dropping bombs from drones, authorities stated.
The United Nations human rights body stated it felt "shocked" by the police operation, urging "prompt and effective investigations".
The area of favelas near the aerial transportation hub is regarded as the main base of among the nation's strongest criminal organizations.
Local authorities stated at least 50 of those killed were "indicated by police as suspected of being criminals".
Dozens of people were injured, including non-combatants affected by the violence.
Community members have compared the mountainous region - home to about 300,000 people - to a "battlefield" since the operation began.
Access ways continue shut in the entire neighborhood.
The Red Command group has been growing their control throughout the region, growing illegal substance trade paths and control of the hillside favelas.
Security forces said over 200kg (441lb) of drugs were captured in the mission, in addition to multiple guns.
The joint operation by various security forces was preceded by a twelve-month inquiry.
Numerous alleged criminals are considered affiliates of a group from the northern region who are currently hiding in the city.
Major law enforcement actions are not uncommon in Brazil prior to significant global gatherings in the nation.
The international environmental meeting COP30 is scheduled in the northern city of Belem in the eleventh month.
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