A Ukrainian presidential advisor warned that Prigozhin's death shows Putin won't negotiate.
Wagner Group boss Yevgeny Prigozhin died in a plane crash last week, confirmed by Russia.
Podolyak added: "So, as long as Putin remains president, the war will continue.
The disparaging comments come just a week after Prigozhin's death, confirmed by Russian officials, in a plane crash outside Moscow.
After Prigozhin's death, multiple officials and critics, including US President Joe Biden and the White House itself, suggested Putin was involved in assassinating Prigozhin and that "no one should be surprised" by his death.
Persons:
Putin, Wagner, Yevgeny Prigozhin, Mykhailo Podolyak, Yevgeny Prigozhin's, there's, Vladimir Putin, Volodymyr Zelenskyy, Podolyak, Prigozhin, Wagner's Prigozhin, Putin Prigozhin's, Sergei Shoigu, Russian Armed Forces Valery Gerasimov, Ukraine —, Joe Biden
Organizations:
Service, Wagner Group, Russian, Staff, Russian Armed Forces, Russia's Ministry of Defense, Kremlin, Al
Locations:
Russia, Wall, Silicon, Moscow, Ukraine, Al Jazeera