Russian pop music group was on board . Plane 's fuel tanks explode after passengers evacuated , he said . The blaze quickly spread throughout the cabin , forcing passengers to evacuate as the aircraft became engulfed in flames . An engine catches fire shortly before takeoff . Authorities launch a criminal investigation .
Russian pop music group was on board . Plane 's fuel tanks explode after passengers evacuated , he said . An engine catches fire shortly before takeoff . Authorities launch a criminal investigation .