Wagner Group leader Yevgeny Prigozhin was on the passenger list of a plane that crashed in Russia's Tver region on Wednesday, according to the press service of the Federal Air Transport Agency .

Ten people were killed in the crash, but it is not yet clear whether he was actually on board the plane.

"An investigation has been launched into the crash of the Embraer aircraft, which occurred tonight in the Tver region. According to the list of passengers, among them is the name and surname of Yevgeny Prigozhin," the department said in a statement.

Among the 10 dead were three crew members and seven passengers. Everyone on board the plane was killed.

This is a developing story. Please check back for updates.