The woman and four other people are said to have been in the apartment during the incident that led to the arrest.
The suspect's victim is a man in his 35s.
- The police were ordered to an address in Härnösand last night and a woman was arrested on the spot who is suspected of attempted murder, confirms the police's spokesperson, Elisabeth Glaas.
Prosecutors have decided to arrest the woman.
The victim was not in need of care at the time of the arrest.