Roscosmos officials explained that a malfunctioning sensor led to an issue with the separation between the two rocket stages, causing one piece of the rocket to fail to separate fully, sending the rocket into a spin and prompting the instant abort. The two men landed safely.
Russian cosmonaut and mission commander Alexei Ovchinin and USA astronaut flight engineer Nick Hague ejected in an emergency capsule on October 11 after the Soyuz-FG launch vehicle taking them to the ISS failed due to a malfunctioning booster.
The last time Russian Federation saw an aborted manned launch was in 1983, when two Soviet cosmonauts jettisoned and landed safely after a launch pad explosion.
"The cause of a non-standard separation" was a "deformation" of a part during assembly, Skorobogatov told a news conference at Russia's mission control outside Moscow.
The lives of Ovchinin and Hague were protected by an automatic emergency rescue system called SAS. They had been due to land on December 13.
Djokovic into Paris quarters as Dzumhur retires
It helped him to maintain the remarkable spell of form that has seen him rise from number 22 in June to the top of the game again. Thiem, also in contention for the ATP Finals, next faces defending champion Jack Sock of the United States.
The other was now in Kourou, a space port in French Guiana which Russian Federation uses for commercial launches of satellites, he added.
Russian officials believe the component was damaged during assembly.
Russian Federation is the only country now able to send astronauts to the International Space Station, and the accident caused it to suspend all launches until getting to the bottom of the rare failed manned launch.
Officials said they would suspend manned launches in light of the latest accident.
Following the investigation, "appropriate law enforcement authorities" will work out who is guilty of the assembly mistake, Lopatin said.
"It has been proven and supported by the documented evidence that the sensor [failure] is to blame for the accident", said the the commission chief Oleg Skorobogatov.
Krikalev said the next launch will now be moved forward to December 3, and will carry the same crew as originally intended on this mission, MS-11: Russian Oleg Kononenko, American Anne McClain, and Canadian David Saint-Jacques.