@b9AcE This is very interesting. If the people involved in the truck incident actually had a master plan, then they'd be prepared with a truck today to just repeat the same act but with lots and lots more people.

I'm assuming the police, SÄPO etc. are ready to stop any sort of vehicles even going in the same direction as this huge crowd.

But my guess is that the marauders aren't organised enough. Hans Brun, one of the terrorist experts interviewed in media, flags the hypothesis that these low-tech attacks are a sign of desperation (because they can no longer coordinate anything particularly large): http://www.svt.se/nyheter/inrikes/terrorforskare-polisen-kan-inte-stoppa-sadana-har-attacker