Google Translate on the last few tweets yields:
- Nicholas Martyshenko here too, carried pic.twitter.com/dxi30I9P
- all a bit scared, but the flight attendants take care of all professional, calm pic.twitter.com/dxi30I9P
- (Name), we are on board, we can not communicate with anyone, just my work twitter
- (Name), everything is fine with the Superjet-100, I was on board, they say just a communication problem
The last one is just an hour old (as of now) so well after the Superjet was reported missing. So seems to be good news, if true. One of the comments on the latter photo suggests the interior shot is from a different type of aircraft.