Taylor Swift is opening up about a scary situation. One week after canceling three Eras Tour shows in Vienna due to a planned terror attack in the city, the "Fortnight" singer broke her silence on the decision, sharing that it was "devastating" to not perform for her Austrian fans. "The reason for the cancellations filled me with a new sense of fear, and a tremendous amount of guilt because so many people had planned on coming to those shows," Taylor wrote in an Aug.

21 Instagram post . "But I was also so grateful to the authorities because thanks to them, we were grieving concerts and not lives." Taylor went on to provide insight into why it took her over a week to speak out publicly on the terror plot, which came to light when Vienna State Police shared in an Aug.

7 press conference that two men had been taken into custody for having "detailed" plans to carry out an attack. A third suspect was later arrested in the case as the investigation continued. "Let me be very clear," the Grammy winner explained, "I am not going to speak about something publicly if I think doing so might provoke those who would want to harm the fans who come to my shows.

" Noting that her "silence" when it came to her Vienna tour stops—scheduled for Aug. 8, Aug. 9 and Aug.

10—was her "actually showing restraint and waiting to express yourself at a time when it’s right to," Taylor continued, "My priority was finishing our European tour safely, and it is with great relief that I can say we did tha.