RIO DE JANEIRO — At least 64 people died on Tuesday in Rio de Janeiro’s most deadly police operation ever, which targeted a major gang days before the city hosts global events related to the United Nations climate summit known as COP30.

Police have often conducted large-scale operations against criminal groups ahead of major events in Rio, which hosted the 2016 Olympics, the 2024 G20 summit and the BRICS summit in July.

Next week, Rio hosts the C40 global summit of mayors tackling climate change and Prince William’s Earthshot Prize, which will feature celebrities including pop star Kylie Minogue and four-time Formula One world champion Sebastian Vettel.

The programming is part of the run-up to COP30, the United Nations climate summit held in the Amazon city of Belem from November 10 to

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