The influx of Middle Eastern and African refugees to Norway may increase the activity of far-right groups in the country, the Local reported, citing a report of the Norwegian Police Security Service (PST).

Norway isn't too worried about Islamic terrorists sneaking into the country, but about the surge of far-right domestic extremism caused by the arrival of a large number of refugees, the report said.

The memory of Anders Breivik, who detonated a bomb in Oslo and killed 77 people at a youth camp on the island of Utoya, still haunts the Norwegian authorities. Radical ultranationalists, similar to Breivik, are exactly the kind of people the PST is worried about.

These lunatics, fueled with anger and hatred, are capable of carrying out devastating terrorist attacks against refugees and everyone who isn't in line with their ideology.

"Resistance against immigration is one of their [far-right groups] pivotal causes and an important mobilization factor for this environment," the police report said, as cited by Reuters.

Meanwhile, Norway is getting ready to receive between 16,000 — 20,000 asylum seekers this year only.

Unless the refugee crisis isn't addressed properly, there would be a surge of far-right domestic extremism across the entire continent, European Commission Vice President Frans Timmermans said earlier this week.