The main suspect in a planned attack on a Taylor Swift concert in Austria had pledged allegiance to the Islamic State militant group and had chemical substances at his home, authorities said.
The 19-year-old, with North Macedonian roots, worked with another 17-year-old Austrian male and is among three people detained after the plot was announced late on Wednesday, to the shock of "Swiftie" fans globally.
Austria's general director for public security, Frankz Ruf, told ORF radio on Thursday that chemical substances and technical devices showing "concrete preparatory actions" were found at the 19-year-old's house in the town of Ternitz.
Swift's three concerts in Vienna, expected to draw 195,000 people, were canceled.
The Kurier newspaper, citing sources familiar with the situation, reported that the suspect had stolen the chemicals from his former workplace, a metal processing company also in Ternitz, and had made progress in building a bomb.
The newspaper reported that he had planned to drive a car into the crowd expected to gather outside the stadium and had also considered using machetes and knives.
Austria's interior ministry and intelligence service were not immediately available for comment on the report's details, and Reuters was unable to verify it.
The case has illustrated risks to stadium shows, music festivals, and other large gatherings, with the planned attack echoing a foiled plot by three Islamic State-linked suspects against Vienna's gay pride parade last year.
Authorities have revamped their national security intelligence in the wake of a 2020 attack by a convicted jihadist in the center of Vienna that left four dead, the first such militant attack in the Austrian capital in a generation.
According to Austria's interior minister announced on Thursday that the investigation into the planned terror attack in Vienna got significant assistance from international intelligence as Austrian law does not allow messenger applications censorship.
"The investigations and I have already hinted at this in this case, were also particularly initiated by international contacts and international information," Gerhard Karner said in a news conference.
Fans in shock
According to US broadcaster ABC, citing law enforcement and intelligence sources, Austrian authorities had received information about the Swift concert threat from US intelligence.
It cited the sources as saying at least one of the suspects had pledged allegiance to ISIS-K, a resurgent wing of Islamic State, on Telegram in June, but the alleged plot was Islamic State-inspired rather than directed by the group's operatives.
Ruf said there was a constant exchange of information with foreign partners, which, together with Austrian authorities' own intelligence, had solidified into a specific threat situation.
The shows were to be part of the record-breaking Eras Tour by the American singer-songwriter, which started on March 17, 2023, in Glendale, Arizona, US, and will conclude on Dec. 8, 2024, in Vancouver, Canada.
Swift, 34, has not yet commented on the cancellations on her official Instagram account, which has 283 million followers.
Her fans were horrified at the threat, with some begging organizers to postpone the concert instead of canceling it outright. Promoters have said they will pay back tickets.
"I can’t believe the concert I’ve been waiting for over 10 years is now gone. I don’t think I’ll ever get over this," said one fan on social media. "As disappointing as not being able to go to this concert is, TRUST ME, I do not want to experience that," added another.
London's performance remains unchanged
British police said there was nothing to indicate that a planned attack on a Taylor Swift concert in Vienna would have an impact on her shows at Wembley Stadium in London next week.
Swift's three concerts in Vienna, expected to draw 195,000 people, this week were canceled after the threat was discovered.
"There is nothing to indicate that the matters being investigated by the Austrian authorities will have an impact on upcoming events here in London," a spokesperson for London's Metropolitan Police said.