Far-right activists burned a Quran in Southern Swedish city of Malmo, sparking riots and unrest after more than 300 people gathered to protest, police said Saturday.
Cars were set on fire and shop fronts were damaged in the clashes which have now been brought under control. There were several arrests.
Earlier on Friday, police barred far-right Danish politician Rasmus Paludan from attending the Kn-burning rally, but his supporters went ahead with the rally instead.
Swedish police turned Mr Paludan back at the border, saying there was a two-year entry ban for him.
The head of the Danish far-right Stram Kurs (Hard Line) party was given a month in jail for a string of offences including racism in Denmark early this year.
He was jailed for posting anti Islam videos on all of his social media.
