MOSCOW — A man wielding a knife attacked and wounded seven people on the central street in the Siberian town of Surgut on Saturday, local news reports and Russian investigators said.

The police later shot and killed the attacker, the Russian authorities said. The attack raised alarms about an expanding wave of terrorism in Europe, even as officials said there was no immediate information on the attacker’s motive.

On Saturday, the Islamic State claimed responsibility for the attack through the group’s Amaq News Agency.

But Russia’s Investigative Committee, a law enforcement group, gave no immediate indication in an initial statement that the stabbings in the Siberian city, an oil industry hub in the far north, had any link to terrorism.