moscow sixteen people kill friday train slam bus break level cross near moscow russia investigative committee say statement bus carry migrant workers uzbekistan shunt several hundred metres track russia rossiya 24 tv channel report footage show fragment leave bus strew across track train appear sustain visible damage bus stall track vladimir myagkov spokesman russian railways tell rossiya 24 crash site people say passengers try push bus track moment train approach collision occur say though carry workers central asian nation uzbekistan bus license plate register kazakhstan russian news agencies report sixteen people kill russia train collide bus