Investigators are examining flight recorders and other evidence to try to determine the cause of a plane crash in Moscow that left four people dead.
The Tu-204 jet belonging to Russian airline Red Wings was carrying eight people, all of them crew members, when it careered off the runway on Saturday while landing at Moscow's Vnukovo Airport.
It ploughed partly into an adjacent road, broke into pieces and caught fire.
The four survivors were said to be in a critical or serious condition in Moscow hospitals.
Vladimir Markin, a spokesman for Russia's main investigative agency, was quoted by Russian news agencies today 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.