A CCTV camera caught the moment of a deadly plane crash near Moscow which claimed 71 lives on Sunday (February 11).
The video, first released on the Russian Telegram channel Mash, showed a big explosion in the distance.
Temperatures were around minus 5 degrees Celsius with periodic snowfall when the short-haul AN-148 operated by Saratov Airlines took off for the city of Orsk in Orenburg region, about 900 miles southeast of the capital.
The investigators said they were looking at all possible causes of the crash.
The plane, manufactured in 2010, had been carrying 65 passengers and six crew. It disappeared from radar screens shortly after taking off from Moscow's Domodedovo airport.