The police were alerted to an apartment in Jakobsberg at 02.37 during the night until Wednesday.
- There we met a woman who has received stab wounds.
She was taken to hospital with what is considered life-threatening injuries, says Fredrik Andersson, duty officer at the police in Stockholm.
A man has been arrested.
- We have blocked off the apartment and will carry out a technical investigation, says Fredrik Andersson.
A preliminary investigation into attempted murder has been launched.