Riots broke out at an unauthorised pro-Palestinian demonstration in Zurich on Thursday evening, leading to 11 arrests. +Get the most important news from Switzerland in your inbox Police used tear gas, rubber bullets and water cannons against the demonstrators. They themselves were also attacked. The Palestine Committee Zurich organised the protest on Instagram. A large police presence was deployed at Zurich main station in the late afternoon after pro-Palestinian demonstrators had already occupied railway tracks in Geneva and Lausanne on Monday evening. + Failure of Geneva Middle East conference reflects 'divided society' At Zurich main station things remained calm for the time being. Shortly after 7.30pm, the organisers of the demonstration called on Instagram for people to gather in Stadtkreis 4. This was followed by calls to Lochergut and Helvetiaplatz - from there, the several hundred demonstrators continued through the city in the direction of Stauffacher. + Swiss foreign ...