Finnish police say two people have died and six people have been injured after a stabbing attack in a market square in the south-western city of Turku.
It was unclear if the incident was related to terrorism, said police, who shot at and arrested one man after the attack. Contrary to earlier reports, police said they were not looking for other suspects.
Police said the suspect was in custody and being treated in hospital after officers shot him in the thigh. People were warned to stay away from Turku as security was reinforced nationwide.
At about 4.40pm, south-west Finland police tweeted: “Several people stabbed in central Turku. People are requested to avoid the city centre.”
Witness Laura Laine told Finnish broadcaster YLE that she stood approximately 20 metres (65ft) from where the stabbing took place. “We heard that a young woman was screaming,” Laine was quoted as saying. “We saw a man on the square and a knife glittered. He was waving it in the air. I understood that he had stabbed someone.”
Paula Risikko, the interior minister, said she did not yet know whether the attack was related to terrorism. Finland is traditionally peaceful but the national security intelligence service raised the terrorism threat level in June, saying it had become aware of more serious terrorism-related plans.
Turku is a former capital of Finland, and remains a hub for business and culture.
In April, an Uzbek man killed four people in neighbouring Sweden by driving a hijacked lorry into a crowd in central Stockholm.
Finland’s prime minister, Juha Sipilä, tweeted: “The government is closely following the events in Turku and the ongoing police operation. The government will meet later today.”
The president of the European commission, Jean-Claude Juncker, said: “It is with great concern that I have learned of the violent attacks in Turku, Finland. While details are still emerging, we strongly condemn this unprovoked attack which comes only 24 hours after the horror that unfolded in Spain.”
Reuters and Agence France-Presse contributed to this report
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