[Translated from German] Since Thursday morning, a major police operation has been underway at Winterthur train station. Several areas and stairways around the new pedestrian and bicycle underpass are cordoned off. An eyewitness, who works across from the cordoned-off area, tells this editorial office that a man of middle age shouted 'Allahu Akbar' (God is great) around 8:30 a.m. and stabbed four men with a knife. At that very moment, a school class also passed the scene. The teacher then positioned herself protectively in front of the children. Another witness, a taxi driver, confirms that a man had been running...