In Zurich, Switzerland, Halloween celebrations escalated into riots and clashes with the police. According to protocol 20, everything started with a peaceful march, but then it was joined by radical left activists who opposed the war in Gaza, the police and fascism. Several thousand people participated in the action. Protesters set fire to cars, garbage cans and electric scooters, set up roadblocks and threw bottles at the police. In response, the police used water cannons and tear gas.