Fears of assassination attempts have risen in Russia after Wagner mercenary chief Yevgeny Prigozhin sought to wage a mutiny against the Kremlin. He is now reportedly staying in a ‘windowless’ hotel room over fears he could be pushed to his death. In May, Russia’s deputy science minister Pyotr Kucherenko, 46, died suddenly after falling seriously ill on a flight to Moscow after a business trip to Cuba.