Wagner mercenary chief Yevgeny Prigozhin is presumed dead, having been named on the passenger list of a private jet that crashed north of the Russian capital, Moscow.
A key ally of Russian President Vladimir Putin, his private military company has played a key role in Ukraine following Moscow’s invasion in February 2022.
But his relationship with Mr Putin soured after Prigozhin ordered his troops to march on Moscow in a day-long rebellion against Russia’s military leaders in June.
The details of the crash are still emerging but here is what we know so far.
Russian aviation officials confirmed the aircraft, an Embraer Legacy, was flying between Moscow and St Petersburg when it crashed in the Tver region, north of Moscow on Wednesday evening.