Wagner boss Yevgeny Prigozhin was on the passenger list of a jet which crashed killing all on board, Russia’s civil aviation authority has said.
Earlier, Wagner-linked Telegram channel Grey Zone reported that the private plane, which belonged to the 62-year-old, was shot down by air defences.
Grey Zone posted later on Wednesday that Prigozhin died “as a result of actions of traitors of Russia”.
Prigozhin led a failed mutiny against the Russian armed forces in June.
The crash comes on the same day that senior Russian general Sergei Surovikin was reportedly sacked as air force chief.