Alsharq Tribune- World News
One person was arrested following the incident, which took place at the Ratina shopping centre in the city of Tampere.
Police say they are interviewing witnesses and have cordoned off the scene, with victims being given first aid.
"The situation no longer poses a danger to outsiders," a spokesperson for the local police force said in a statement.
Tampere, Finland's third-largest city, lies in the south of the country, around 112 miles northwest from capital Helsinki.
They did not give details on the extent of the injuries nor on the perpetrator.