Mob of black-clad masked men went on a rampage in and around Stockholm's main train station targeting refugee children
Before the attack, the group of 200 people handed out xenophobic leaflets with the message 'Enough now'.
Swedish media reported that the thugs, allegedly linked to Sweden's football hooligan scene, were targeting unaccompanied minors with a 'foreign' background.
The mob, wearing all-black balaclavas and armbands, 'gathered with the purpose of attacking refugee children' Stockholm police spokesman Towe Hagg said.
'Police are now looking into the leaflets that were handed out by masked people before the attack'.
Authorities confirmed that at least 40-50 people went on a rampage at 9pm on Friday night attacking migrants.
Witnesses told Aftonbladet newspaper that they saw a gang of black-clad thugs attacking refugees at the station.
'I saw maybe three people who were beaten. That was no football brawl or something similar. They targeted migrants. I was quite scared and ran away,' a witness said.
The leaflet handed out before the attack refers to the alleged murder of Alexandra Mehzer, a 22-year-old aid worker knifed to death at the child centre where she worked in Molndal, Sweden.
A Somali-born 15-year-old migrant has been accused of killing her during a fight between two asylum-seekers.
'All over the country, reports are pouring in that the police can no longer cope with preventing and investigating the crimes which strike the Swedish people,' reads the leaflet.
'In some cases, for example, in the latest murder of a woman employed at a home for so called 'unaccompanied minor refugees' in Molndal, it goes as far as the National Police Commissioner choosing to show more sympathy for the perpetrator than the victim,' it continues.
'But we refuse to accept the repeated assaults and harrassment against Swedish women.'
'We refuse to accept the destruction of our once safe society. When our political leadership and police show more sympathy for murderers than for their victims, there are no longer any excuses to let it happen without protest.'
'When Swedish streets are no longer safe to walk on for normal Swedes, it is our DUTY to fix the problem,' the leaflet reads.
'This is why, today, 200 Swedish men gathered to take a stand against the north African 'street children' who are running rampage in and around the capital's central station.'
'Police have clearly showed that they lack the means to stop their progress and we see no other way than to hand down the punishment they deserve ourselves.'
'The justice system has walked out and the contract of society is therefore broken - it is now every Swedish man's duty to defend out public spaced against the imported criminality.'
'Those who gathered today are neither your politician, your journalist or your policeman. We are your father, your brother, your husband, your colleague, your friend and your neighbour.
'Swedish men and women deserve safety in their everyday life and we are therefore calling on all others who also see the problem to follow in our footsteps, both in Stockholm and in other places around the country. For a better future together'
On Saturday, a 47-year-old man was arrested on suspicion of assault for punching a police officer in the face.
Three youngsters have also been arrested on Friday night for disturbing public order.
Last week, Swedish police warned that Stockholm's main train station has become unsafe after being 'taken over' by dozens of Moroccan street children.
As the quote says: "First they came for the Jews and I did not speak out because I was not a Jew. Then they came for the Communists and I did not speak out because I was not a Communist. Then they came for the trade unionists and I did not speak out because I was not a trade unionist. Then they came for me and there was no one left to speak out for me." ~Martin Niemöller, 1946