The Islamic State group on Saturday claimed responsibility for deadly attacks in Spain and stabbings in Russian Federation, in statements carried by the jihadists' propaganda agency. A local news site, K-Inform, initially reported that three men in masks had attacked pedestrians with knives, an ax and firearms.
Soon after the stabbings, the "Islamic State" (IS) militia claimed responsibility and described the man as a "soldier" of the jihadist group.
It said armed police called to the scene had "liquidated" the attacker.
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A spokesman for Russia's Investigations Committee tells Reuters that it "is investigating attempted murder".
Amateur video emerged from the scene, showing a policeman kneeling over the motionless body of the suspect. Two have already been discharged. The report said one woman was stabbed while standing at an ATM.
The region's governor was flying out to the city to hold a meeting with investigators, regional authorities said.
It comes after two people were killed and eight injured Friday in a stabbing attack in the Finnish city of Turku.