Several cars of a passenger train derailed between Moscow and St. Petersburg late Friday.
The AP reports the state-run Russian Railways has confirmed the derailment was deadly, but did not specify how many people were killed. The Railways also said the crash may have been the result of sabotage, increasing fears that it was the work of terrorists. Russian news agencies are reporting 22 people were killed and 55 injured.
Law enforcement say a small crater was found at the scene of the derailment, increasing speculation that a bomb had exploded. In 2007, a bomb blast on the same line injured 27 people.
The BBC reports the train, named the Neva Express, was traveling on one of the busiest rail links in Russia.