Mercenary leader Yevgeny Prigozhin, who led a brief armed rebellion against the Russian military earlier this year, was aboard a plane that crashed north of Moscow on Wednesday, killing all 10 people on board, according to Russia's civil aviation agency.
The crash immediately raised suspicions since the fate of the founder of the Wagner private military company has been the subject of intense speculation ever since he mounted the mutiny.
At the time, President Vladimir Putin denounced the rebellion as "treason" and a "stab in the back" and vowed to avenge it. But the charges against Prigozhin were soon dropped. The Wagner chief, whose troops were some of the best fighting forces for Russia in Ukraine, was allowed to retreat to Belarus, while reportedly popping up in Russia from time to time.
The crash also comes after Russian media reported that a top general linked to Prigozhin was dismissed from his position as commander of the air force.
A plane carrying three pilots and seven passengers that was en route from Moscow to St Petersburg went down almost 300km north of the capital, according to officials cited by Russia's state news agency Tass.
Russia's civilian aviation agency, Rosaviatsia, quickly reported that he was on the manifest and later said that, according to the airline, he was indeed on board.
Earlier, Vladimir Rogov, a Russia-appointed official in the partially occupied Zaporizhzhia region in Ukraine, said he talked to Wagner commanders who also confirmed that Prigozhin was aboard, as was Dmitry Utkin, whose call sign Wagner became the company's name.
"I don't know for a fact what happened but I'm not surprised," US President Joe Biden said.
Keir Giles, a Russia expert with the UK international affairs think-tank Chatham House, had urged caution about reports of Prigozhin's death. He said "multiple individuals have changed their name to Yevgeniy Prigozhin, as part of his efforts to obfuscate his travels."
"Let's not be surprised if he pops up shortly in a new video from Africa," Giles said.
Flight tracking data reviewed by The Associated Press showed a private jet that Prigozhin had used previously took off from Moscow on Wednesday evening and its transponder signal disappeared minutes later.
The signal stopped suddenly while the plane was at altitude and traveling at speed. In an image posted by a pro-Wagner social media account showing burning wreckage, a partial tail number matching a jet previously used by Prigozhin could be seen.
Videos shared by the pro-Wagner Telegram channel Grey Zone showed a plane dropping like a stone from a large cloud of smoke, twisting widely as it falls. Such freefalls can occur when an aircraft sustains severe damage, and a frame-by-frame analysis by The AP of two videos were consistent with some sort of explosion mid-flight. The images appeared to show the plane is missing a wing.
Prigozhin was sometimes called "Putin's chef", after regularly being entrusted to provide catering services to the Kremlin and it's leader.
Wagner forces were heavily involved in capturing the eastern Ukrainian cities of Soledar and Bakhmut following Russia's 2022 invasion of Ukraine.
Prigozhin then spent months criticising Russian military leadership and the support it was giving his troops before he called for the armed rebellion in late June.
Wagner troops seized control of southern Russian city Rostov-on-Don before threatening to march towards Moscow, leaving police to block all roads leading to the capital.
However, the armed mutiny against Russia's military leadership was short-lived, lasting just two days.
The Kremlin said Prigozhin would be exiled to Belarus, and his fighters would either retire, follow him there, or join the Russian military.
Shortly after that, Wagner fighters set up camp in Belarus, but Prigozhin's plane, according to media reports, was flying back and forth between Belarus and Russia.
This week, Prigozhin posted his first recruitment video since the mutiny, saying that Wagner is conducting reconnaissance and search activities, and "making Russia even greater on all continents, and Africa even more free."
As the news about the crash was breaking, Russian President Vladimir Putin spoke at an event commemorating the Battle of Kursk, hailing the heroes of Russia's "the special military operation" in Ukraine.
With Associated Press, CNN