You're reading: RFE/RL: Russia steps up investigation of knife attack claimed by Islamic State

Russian federal authorities in Moscow have taken over the investigation into a stabbing rampage in the city of Surgut that left seven people injured and was claimed by the extremist Islamic State (IS) group.

The Investigative Committee, the Russian analogue of the U.S. FBI, said in an August 20 statement that its main investigative department would lead the probe into the attack a day earlier, citing the “wide public resonance” of the case.

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