Police deployed water cannons in Zurich’s District 4 on Saturday night, October 31, as clashes broke out around Langstrasse and Helvetiaplatz. https://twitter.com/cedar_news/status/2116709305541890408?a=iorU-yPQGENrIsBcADg&s=20 Several hundred people gathered in the area for an unauthorized demonstration, according to Swiss media. Participants erected barricades using rubbish containers and other objects, setting some of them alight. Officers moved to push demonstrators back while firefighters extinguished burning objects.