In a conference call with reporters, Kremlin spokesman Dmitry Peskov said an agreement was struck with Prigozhin. Yevgeny Prigozhin, the head of the Wagner paramilitary group, has agreed to leave Russia for Belarus, the Kremlin said Saturday, in a deal apparently brokered by Belarusian President Alexander Lukashenko that ends an armed insurrection, which marked the gravest threat to Russian President Vladimir Putin’s authority in decades.