Police suspect the couple was behind Sunday's Oodi mediation. Police suspect the couple had mistreated the victim to rob her.
One person was stabbed in the basement floor disabled toilet at the Helsinki Central Library in Oodi. The stabbing took place in the afternoon after 3 pm.
Police said Monday that the settlement was being investigated as a serious robbery.
Read more: In the Oodi Library in Helsinki, a stabbing - the victim called for help with a disability
According to police, a rifle was used in the settlement and one person was injured. The victim was taken to hospital. According to police, the victim's injuries are not life-threatening and do not require any longer treatment.
The suspects left Oodi. They have not yet been reached by the police.