Austrian authorities have arrested two suspects, aged 19 and 17, accused of planning a terrorist attack during now-canceled Taylor Swift concerts in Vienna. The 19-year-old, believed to be radicalized in support of the Islamic State, had chemical substances and technical devices at his home, while the 17-year-old was found to possess materials related to both ISIS and al-Qaida. The suspects allegedly intended to use knives and homemade explosives to kill concertgoers outside the Ernst Happel Stadium, which was expected to host 170,000 attendees. Austrian Interior Minister Gerhard Karner emphasized that the threat was serious but that it had been effectively neutralized before any tragedy could occur. Swift expressed her fears of violence at concerts in the past, making the incident particularly distressing for her fans. As a result of the arrests, the sold-out shows have been canceled, leaving many fans disappointed and financially impacted.