U.S. Secretary of State Antony Blinken also commented on the developing situation.
"The fact that Prigozhin made a direct challenge to Putin's authority, the fact that he questioned publicly the very premises that Putin has advanced for the aggression against Ukraine – that's playing out and will continue to play out," Blinken told MSNBC's Andrea Mitchell on Wednesday when asked about the incident.
"We've seen the ongoing drama, too, of where is Prigozhin, what is the arrangement with Putin?" he added. "If I were Mr. Prigozhin, I would remain very concerned. NATO has an 'Open Door' policy; Russia has an open windows policy, and he needs to be very focused on that."
The "open windows policy" was a tongue-in-cheek reference to the fact that numerous prominent Russian officials and businessmen who fell out of favor with Putin died by what local authorities described as falling out of windows or off of balconies.