By MATTI HUUHTANEN
HELSINKI (AP) — A 16-year-old student who had threatened "to kill the whole school" stabbed three fellow students and a janitor on Thursday at a vocational school in northern Finland, police said.
All four victims were seriously injured but were in stable condition in a local hospital. Their condition was not life-threatening, Police Sgt. Tommi Tikka said.
Deputy Police Chief Arto Karnaranta said they had arrested the suspect at the college in the town of Oulu, 600 kilometers (370 miles) north of the capital, Helsinki. Karnaranta said the suspect admitted to the stabbings but did disclose a motive.
Three of the victims were aged 15 to 20 years, police said. The male janitor was aged 20-21. Police did not give exact ages.
Karnaranta said police had no warning of the attack but that the suspect had made threats against the school in February.
"He had, on a games page on the Internet, expressed the idea that he would carry out a school shooting at some stage ... saying that he would 'kill the whole school' if he had a gun," Karnaranta told reporters. He said police found no weapons at the time.
Karnaranta said police had questioned the boy and his family about the February threat but released him after being assured that he had made it on a whim and did not mean what he said.
In 2008, a 22-year-old gunman killed nine fellow students and a teacher before shooting himself at a vocational high school in western Finland, less than a year after a teenage student fatally shot eight people and himself at a high school near Helsinki.