Three teenagers have been arrested in Austria for plotting a terrorist attack inspired by the Islamic State on Taylor Swift's concerts in Vienna, prompting the cancellation of three sold-out shows. The main suspect, a 19-year-old, confessed to planning a suicide attack using knives and explosives and had pledged allegiance to the Islamic State. Authorities discovered bomb-making materials and other weapons at his home. A second suspect, aged 17, and an 18-year-old were also taken into custody. The arrests have caused some Swift fans to reconsider attending her upcoming Wembley Stadium shows in London due to safety concerns. This incident highlights a broader trend of rising extremist activities in Europe driven by online radicalization.