In some places counter-protesters attacked police ahead of planned right-wing extremist demonstrations. Prime Minister Magdalena Andersson has condemned the violence.
“Three people seem to have been hit by ricochets and are now being cared for in hospital. All three injured are arrested on suspicion of crime,” police said in an online statement, adding none of the injuries were life-threatening.
Police said the situation in Norrköping was calm on Sunday evening.
Police and protesters have been engaged in serious clashes during the past few days where several police have been injured and multiple vehicles have been torched.
The violence began on Thursday after a demonstration organized by Rasmus Paludan, leader of Danish far-right political party Hard Line.
Paludan, who had permission for a series of demonstrations across Sweden during the Easter weekend, is known for Quran burnings.