The woman in her 30s was attacked at her workplace during the night leading up to Sunday. She was found with severe cutting and stabbing injuries, among other things, to her neck and chest, according to Norwegian TV2's information.
A 18-year-old man, who lived at the residence in question, was arrested shortly after the incident. At the time of the arrest, he said he had planned to acquire a firearm and kill more people, including at a mosque, TV2 reports.
In police questioning, he later stated that the murder of the woman was "politically motivated".
Norwegian police and security police are said to have been aware of the man before the incident, as at least one report of concern had been received regarding his "radicalization in a right-wing extremist direction".
The deceased woman is said to have a foreign background.
The arrested 18-year-old is said to have lived large parts of his life in Norway, but is not a Norwegian citizen, according to the information.
