Russian news agencies are reporting that investigators have found traces of explosives among the wreckage of a train that derailed, killing at least 26 people.
The reported discovery appears to buttress initial fears that the deadly derailment on the Moscow-St. Petersburg line Friday night was a terrorist attack caused by a bomb planted on the tracks.
The Interfax and RIA Novosti news agencies cite Federal Security Service chief Alexander Borotnikov as saying Saturday that a home-made bomb equivalent to 7 kilograms of TNT had detonated, derailing the express train Friday night.
The death toll is still unclear: The Health Ministry says 26 people were killed but prosecutors say at least 30. Dozens of people have been reported injured.
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