Elon Musk foiled an attack on Russia’s Black Sea fleet last year by refusing to let Ukraine use his satellite network to guide its drones, Mr. Musk has acknowledged, provoking a furious response from a top official in Kyiv and renewing questions about the global power wielded by a multibillionaire businessman. But Mr. Musk would not allow the network to be used for an attack last September with maritime drones on the Russian naval base at Sevastopol in Crimea, the Ukrainian territory that Russia illegally seized in 2014 and then annexed. At the time of the attempted attack, Mr. Musk spoke with the Russian ambassador to the United States, Anatoly I. Antonov, who had told him an attack on Crimea “could lead to a nuclear response,” according to a biography of Mr. Musk by the historian and journalist Walter Isaacson. The account was included in an excerpt from the book published on Thursday by The Washington Post. Mr. Musk confirmed elements of the story, writing on his social network X, formerly Twitter, “If I had agreed to their request, then SpaceX would be explicitly complicit in a major act of war and conflict escalation.”

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Persons: Elon Musk, Musk, Anatoly I, Antonov, Walter Isaacson Organizations: Mr, SpaceX, Russian, The New York Times, The Washington Locations: Ukraine, Kyiv, Russia, Sevastopol, Crimea, Ukrainian, Russian, United States