Swift had been slated to perform three shows in the Austrian capital.
All tickets will be automatically refunded within the next 10 business days."
The shows were slated for Thursday, Friday, and Saturday.
Taylor Swift.Credit:Andreas Rentz/TAS24/Getty
A representative for Swift declined to comment further.
Further details were scarce, but Ruf told reporters that unnamed chemical substances were secured and were being investigated.
Swifties who had been planning to attend the Vienna shows can go tooeticket.com/help/updates/for more information.
