Russian prime minister Medvedev said that “the key task is to investigate in detail what caused the tragedy”.
The Kremlin’s spokesman Dmitry Peskov said that there are not yet any grounds to rule out any theory for the crash of a Russian airliner.
Bomb most likely cause, says French aviation expert
Michel Polacco, aviation expert on France Info radio, said terrorism was the most likely cause of the crash.
“A break-up of the plane mid-flight that results in the type of debris we have seen can only come from a serious blow to the plane’s structure,” and most likely an explosion, said Mr Polacco, a pilot and flight instructor.
“It can be due to technical causes, but that is very unlikely and has rarely occured. That leads us to the terrorist line of inquiry, of a bomb that can have such effects,” he said.
Russian airline claims crash could only be caused by “impact on plane”
Alexander Smirnov, the deputy general director of Metrojet, said that no technical fault could have caused the plane to break up in the air, adding that it “could only have been a mechanical impact on the plane” in the air.
He said that a previous tail strike “was repaired fully“, and had no effect on its safety.
The plane’s engines were last inspected in Moscow on October 26, according to the airline, which claims that no problems were found.
They also said that the plane’s crew did not make any contact with the ground during the flight, and suggested that it would be impossible for the plane to break up in the air because of a technical or pilot fault.
See full summary in source Telegraph. co. UK