This other source says:
Comes with longer version of the video.
http://www.independent.co.uk/news/world/europe/hundreds-of-masked-men-beat-refugee-children-in-stockholm-a6843451.html
After the attack, the Swedish Resistance Movement, a neo-Nazi group, released a statement claiming the attack had "cleaned up criminal immigrants from North Africa that are housed in the area around the Central Station".
The statement added: "These criminal immigrants have robbed and molested Swedes for a long time."
"Police have clearly shown that they lack the means to stave off their rampage, and we now see no other alternative than to ourselves hand out the punishments they deserve."
Comes with longer version of the video.