In English, you see descriptions like this: “Norwegian police said they were investigating a knife attack in Oslo by a suspected assailant from Russia as a possible terror-related act. The suspect is a 20-year-old ‘Russian national’ who arrived in Norway on Thursday from Russia, via Sweden.”
But if you look at a translation of the article in this Swedish publication, (h/t MarvinW) you see that the perpetrator who is a MUSLIM with Russian citizenship went to Norway via Sweden and chose his victim at random. He has stated that he wanted to commit a terrorist act and kill many people .
The woman who was stabbed in the back inside a Kiwi store in Møllergata in central Oslo was taken to hospital and on Thursday her condition was described as critical but stable. The suspect was arrested shortly afterwards.
On Friday, the Norwegian equivalent of Säpo, took over the investigation of the case being treated as a potential terrorist attack. According to PST, it is too early to tie the perpetrator to a specific Islamic terrorist group. The 20-year-old attacker is from the Muslim-dominated republic of Bashkiria.
“He has explained that he has a connection with Islam, and that he wanted to kill more people and that this was a terrorist act.”
According to NST, the PST said nothing indicated that other people were involved or that other attacks were planned. It also said it was evaluating whether to raise the threat level in Norway. In an assessment published in 2018, the PST said it was “possible” an attack inspired by radical Islam could take place in the country.
If the attack were to be confirmed as a case of radical Islam, it would be the first in the Scandinavian country. As in Sweden, PST has found that Islamic extremists are the biggest terrorist threat against Norway.