Hundreds of Taylor Swift fans gather in Vienna after concerts cancelled

The Ernst Happel Stadium, where up to 65,000 fans had been expected, sat empty on Thursday

Police kept a watchful eye on the event (AP)

Police kept a watchful eye as hundreds of Taylor Swift fans gathered and sang her songs in the Austrian capital, after a terror alert led to her live concert in the city being abruptly cancelled.

Three sold-out stadium shows in Vienna, part of Swift’s Eras Tour, were halted by organisers after officials announced arrests over an apparent plot to attack her concerts, saying they appeared to be inspired by the so-called Islamic State group and al-Qaida.