"Due to information received during the night, the Turku stabbings are now being investigated as murders with terrorist intent", the National Bureau of Investigation said in a statement.
Police officers stand next to a person lying on the pavement in the Finnish city of Turku where several people were stabbed on August 18, 2017.
One person has been shot and arrested after being shot in the leg, by police in the Finnish city of Turku, according to police. As per Ilta-Sanomat, six people were injured, including a man and five woman.
"There was only one shot fired and the aggressor was apprehended and brought to hospital", he said, confirming that a total of eight people were stabbed. Police also say they are looking for more potential suspects. The events took place around the adjoining squares Puutori and Kauppatori.
"People are requested to avoid the city center", South-West Finland police tweeted at 4:40 p.m. local time.
Witness Laura Laine said she was alerted by hearing a young woman screaming loudly at the corner of the market square.
"We have a heightened awareness level of terrorism now but we did not have any specific threats to act upon", Turku Superintendent Stephan Sundqvist told CNN.
Multiple ambulances, fire engines, and police cars are attending the centre of the city, which is 90 miles west of Helsinki.
Prime Minister Juha Sipilä has called an emergency meeting with his cabinet. Police on Saturday raised the number of injured in the attack from six to eight.
The stabbing in Finland comes on the heels of ISIS terrorists attack in Barcelona which left 13 people dead and 100 others injured. I thought, it's just kids having fun. but then people started to move around and I saw a man with a knife in his hand, stabbing a woman.
'Several people stabbed in central Turku.