Prigozhin, the mercenary chief urging an uprising against Russia's generals, has long ties to Putin

Once a low-profile businessman who benefited from having President Vladimir Putin as a powerful patron, Yevgeny Prigozhin moved into the global spotlight with Russia’s war in Ukraine.

As the leader of a mercenary force who depicts himself as fighting many of the Russian military’s toughest battles in Ukraine, the 62-year-old Prigozhin has now moved into his most dangerous role yet: preaching open rebellion against his country’s military leadership.

Prigozhin, owner of the Kremlin-allied Wagner Group, has escalated what have been months of scathing criticism of Russia’s conduct of the war by calling Friday for an armed uprising to oust the defense minister. Russian security services reacted immediately, opening a criminal investigation and urging Prigozhin’s arrest.

In a sign of how seriously the Kremlin took Prigozhin’s threat, riot police and the National Guard scrambled to tighten security at key facilities in Moscow, including government agencies and transport infrastructure, Tass reported. Prigozhin, a onetime felon, hot-dog vendor and longtime associate of Putin, urged Russians to join his “march to justice.”