ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: A Russian passenger plane with up to 12 people on board split into three pieces after sliding off a runway and crashing into a highway outside a Moscow airport on Saturday, officials said.<br/> <br />State-run RIA news agency said two people were killed. Interfax later reported four were dead, citing the Interior Ministry.<br/> <br />Russia 24 TV channel showed footage of a wrecked plane on a highway outside Vnukovo airport, with emergency workers trying to access plane doors and working on a a mangled part of the front of the fuselage.<br/> <br />An Emergency Situations Ministry official said on television that 12 people were aboard.<br/> <br />The Tupolev-204 passenger plane was operated by the Russian airliner Red Wings and traveling from Czech Republic, Russian officials said.