Authorities in Vienna, Austria, have arrested two men in connection with a planned terror attack at Taylor Swift’s upcoming concerts in the city, the New York Post reports. Austrian federal and state police apprehended a 19-year-old suspect who had allegedly pledged allegiance to ISIS, according to Vienna State Police Director Franz Ruf and Police Chief Gerhard Purstl.

Officials stated that both suspects had become radicalized through the internet and had developed specific and detailed plans for carrying out an attack. During the arrest of the 19-year-old, a bomb squad reportedly found chemical substances, which investigators are examining to determine if they could have been used to construct a bomb.

Austria’s Cobra unit, comparable to the FBI’s Hostage Rescue Team, assisted in making the arrests.

Swift is scheduled to perform at the Ernst-Happel-Stadion in Vienna on Thursday, Friday, and Saturday as part of the international leg of The Eras Tour. Despite the arrests, police officials stated there are no plans to cancel the concerts, assuring that “the concrete danger has been minimized.”

Security measures at the concerts will be significantly increased, including the deployment of heavy weapons teams, K-9 units, bomb squads, and tactical vehicles. Fans have been advised to anticipate delays due to extensive checks of visitors and vehicles by authorities.

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Swift is in the midst of a global tour and has made plenty of headlines throughout the past year. Earlier this summer, she attempted to shake off a humbling moment while taking her “Eras” tour through Dublin, Ireland. Video of the incident captured the 34-year-old singer catching her costume in a concert structure, forcing a backup dancer to rush to her aid in the middle of a ballad.

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People Magazine reported on the incident and found the video of Swift getting stuck on a raised platform that weekend, forcing one of her dancers to lend her a helping hand. The mishap came as Swift was belting out lines from “The Smallest Man Who Ever Lived,” a signature tour track from her latest album, “The Tortured Poets Department.” Retraction of a platform inside Aviva Stadium did not go as planned, the outlet added, leading dancer Jan Ravnik to assist her in stepping down. Fan footage shows the two trading smiles as Swift continues to sing as if nothing happened.

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Another angle shows Swift looking around for help as Ravnik struts up to her position, swirling her around in his arms while an appreciative crowd continues singing along.