Unconfirmed CCTV footage appearing on social media has revealed that the Sukhoi Superjet 100 that burst into flames at Moscow's Sheremetyevo Airport on Sunday took off first, then quickly dove, causing its engines to explode as it hit the ground.
There is, as yet, no official confirmation that the video is authentic.
A Murmansk-bound Sukhoi Superjet, flight SU1492, caught fire after a hard emergency landing. The Russian Investigative Committee stated 13 dead and an unnamed number injured.