According to the newspaper, it was during the weekend that the man escaped from the care facility by running away from the staff during a walk with a companion.
The 19-year-old was sentenced in 2018 to inpatient forensic psychiatric care with a special discharge test after he killed a student at a high school in Enskede in December 2017.
An international search warrant has been issued and the police are searching for the convicted man, Expressen reports.