A leader of a Danish far-right movement was banned from Sweden for two years after attempting to burn a Quran.
Violence erupted in Malmö on Friday after hundreds of people protested against anti-Muslim acts.
Around 300 rioters threw objects at police and set fire to debris. Several police officers were slightly injured and 15 people detained.
The violence followed the burning on Friday afternoon of a Quran by far-right activists near a predominantly migrant neighbourhood, according to the TT news agency cited by news agency AP.
Later, three people were arrested on suspicion of inciting hatred against an ethnic group after kicking the Muslim holy book.
The gesture came after Swedish police banned a planned far right-demonstration in Malmö due to "safety" issues.
The rally had been organised by Rasmus Paludan, leader of the Danish far-right party Stram Kurs (Hard Line).
Swedish authorities detained him in Lernacken and eventually banned him from the country for two years after he attempted to reach the southern Swedish town despite the ban on the protest.
Malmö police said "his behaviour" posed "a threat to the fundamental interests of society".