Investigators are examining flight recorders and other evidence to try to determine the cause of the airliner crash in Moscow that killed four people.
The Tu-204 belonging to Russian airline Red Wings was carrying eight people, all of them crew members, when it careered off the runway Saturday while landing at Moscow's Vnukovo Airport. It went partly into an adjacent highway, broke into pieces and caught fire.
The four survivors were reported in critical or serious condition in Moscow hospitals.
Vladimir Markin, a spokesman for Russia's main investigative agency, was quoted by Russian news agencies Sunday as saying the data recorders were being examined, along with fuel samples. In addition, he said flight documents for the plane have been taken from the airline for examination.