The Investigative Committee (SK) said the identities of all 10 victims had been established and corresponded to those on the flight’s passenger list.
Prigozhin’s private jet came down north-west of Moscow on 23 August, killing all those on board.
Russian investigators on Sunday confirmed that Yevgeny Prigozhin was among those who died in a plane crash in Russia earlier this week. The plane, carrying ten people, crashed in the Tver region north of Moscow on August 23.
Prigozhin was the leader of the Wagner private military group, which staged a mutiny against the Kremlin in late June.
Russia’s Investigation Committee said that the results of genetic tests had confirmed the identities of all ten people who died in the crash.
“Molecular-genetic examinations have been completed as part of the investigation into the plane crash in the Tver region,” Investigative Committee spokeswoman Svetlana Petrenko said.
“According to their results, the identities of all 10 victims were established, they correspond to the list stated in the flight list,” she added.
Prigozhin and Utkin were both on the list of passengers issued by Russia’s civil aviation authority.
Russian officials opened an investigation into air traffic violations after the incident.
The Investigative Committee on Sunday did not provide further details as to what may have caused the crash.
US officials quoted by CBS have said that the most likely cause of the crash was an explosion on board the plane, and the Pentagon said Prigozhin was probably killed.
On Friday Kremlin spokesman Dmitry Peskov said rumours of foul play were an “absolute lie”.
Mr Putin has sent his condolences to the families of the victims.
He described Prigozhin as a “talented person” who “made serious mistakes in life”.
Kremlin spokesman Dmitry Peskov called the incident “tragic” and said that speculation that it was orchestrated by Moscow was an “absolute lie.”
