Clashes erupted in an immigrant neighbourhood in Sweden’s third largest city after an anti-Muslim protester set fire to the Quran, police said on Monday. Police in Malmo said they were pelted with rocks and dozens of cars were set on fire, including in an underground garage, describing the events that started on Sunday and lasted overnight as “a violent riot”.

The clashes started after an anti-Islam activist Salwan Momika on Sunday burned a copy of the Quran and an angry mob tried to stop him while the police—some of them helmeted—detained several people. At least three people have been detained, police said.