Fruits of Multiculturalism Update from [1] Aftenposten, with thanks to Jeffrey Imm:

The Norwegian Police Security Service (PST) has other persons linked to the 2004 terrorist attack in Madrid and recent terrorism arrests in Italy under surveillance.

The PST believes that Norway is used by 'freelance' terrorists as a place to lie low and plan activities, newspaper VG reports.

By using false identities and convincing cover stories these persons can stay hidden in Norway for long periods, posing as asylum seekers, tourists, or by arranging unfounded family reunions.