From an AP story headlined “Who is the head of the mercenary group calling for an armed rebellion in Russia?”:

The head of the private military contractor Wagner called Friday for an armed rebellion aimed at ousting Russia’s defense minister. Russian security services reacted immediately by opening a criminal investigation into Yevgeny Prigozhin.

He has previously bashed the country’s military leadership for failures in the war in Ukraine, and is known for his long-running feud with the Defense Ministry.

A look at the 62-year-old Prigozhin and Wagner’s role in the war:

WHAT DID PRIGOZHIN SAY?