Police report that the suspect is a local man born in 1989.
Emergency services received a call at around 9:30 AM that a man had been injured in the hand by gunfire at a nearby office. Soon thereafter, a report was received of shooting at the school. Police believe that the shooter in both incidents was the same man.
Police apprehended the suspect, who they say took a shotgun into the building and fired four shots from a school hallway into a classroom door.
Police say no motive for the shootings is yet known.
The newspaper Aamulehti was first to report the incident.