Bodies piled up in poor neighborhoods of Rio de Janeiro on Tuesday as police launched their biggest ever raids on the city's drug traffickers, leaving at least 64 dead in war-like scenes. As many as 2,500 heavily-armed officers, backed by armored vehicles, helicopters and drones took part in the operation…

About 2,500 Brazilian police and soldiers launched a massive raid on a drug-trafficking gang in Rio de Janeiro on Tuesday, arresting 81 suspects and sparking shootouts that left at least 60 suspects and four police officers dead, officials said.

The UN human rights office said Tuesday it was "horrified" by police raids on drug traffickers in Rio de Janeiro that left at least 64 dead, calling for swift investigations.