At least 64 people were killed during a police operation against the Red Command gang in Rio de Janeiro's northern suburbs, marking the largest and deadliest raid in the Brazilian state's history.

Four police officers were among those killed during Operation Containment in the Alemão and Penha districts, as confirmed by state Governor Cláudio Castro. Over 80 individuals were arrested amidst the chaos.

Fierce clashes erupted when approximately 2,500 security personnel executed the operation early Tuesday morning. The Red Command, one of Brazil's most notorious crime syndicates, reportedly responded with gunfire, burning barricades, and even drone assaults.

The United Nations Human Rights Office expressed shock and horror at the scale of the police action, urging swift investigations into the violence.

The affected area, close to Rio's airport, is notorious for being a stronghold of organized crime in Brazil. State officials indicated that around 50 of the deceased were identified as suspected criminals.

Many civilians also suffered injuries from the crossfire, contributing to a climate of fear and chaos in the community. Eyewitness accounts describe the locality as resembling a 'war zone'. Road closures persisted throughout the region as police operations continued.

Amid this operation, police reported seizing over 200 kg (441 lbs) of narcotics and a significant number of firearms. The operation is a culmination of a year-long investigation and occurs against the backdrop of the upcoming UN climate summit COP30, scheduled for November in the northern city of Belem.

As Rio Police continue their crackdown on detained gang members and organized crime, the ramifications of this raid on local communities and the broader issue of public safety remain significant.