Officials in Russia say the mercenary leader Yevgeny Prigozhin was among 10 people killed Wednesday when a private jet crashed northwest of Moscow. The crash also reportedly killed Dmitry Utkin, a senior mercenary commander who founded the Wagner Group in 2014. Eyewitnesses to the crash reported hearing two bangs before the plane tumbled from the sky — an incident that was apparently captured in a video widely circulated on social media. The crash sparked widespread speculation that Prigozhin and other Wagner leaders were assassinated for leading a failed mutiny in June that saw heavily armed mercenaries advance to within 120 miles of Moscow. Adding to the speculation, Russian media reported Wednesday the Kremlin has fired senior Russian General Sergey Surovikin as Air Force chief. The general was known as an ally of the Wagner Group and had not been seen in public since the mutiny.