Vienna's main train station was evacuated due to an unspecified threat, halting rail traffic. Although the all-clear was given after 90 minutes, delays and cancellations persisted. The threat was rumored to be a bomb,

Police are clearing Vienna's main train station over an unspecified threat and rail traffic has been halted, the Austrian capital's police and national rail company OBB said on Monday. "A large police operation is underway at Vienna's main station.