Police evacuated Vienna's main train station on Monday over an unspecified threat, halting rail traffic before giving the all clear around 90 minutes later, but national rail company OBB warned continued delays and cancellations were expected.

Police are evacuating 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 has said. While the police did not describe the threat, tabloid newspaper Heute said it was a bomb threat.

A train station in Vienna has been evacuated as an "unspecified threat" has sparked havoc in the Austrian capital. At the moment, all trains have been halted, the national rail company OBB has revealed.