A man faces terrorism charges in connection with an attack on a Taylor Swift concert in Vienna

Austrian prosecutors filed terrorism-related charges Monday against a 21-year-old suspect they say planned to do attack one of the superstar singer Taylor Swift concerts in Vienna in August 2024.

Vienna’s public prosecutors said in a statement that the unnamed defendant made the announcement allegiance to the Islamic State group by sharing propaganda materials and videos using various messaging services.

Prosecutors in Vienna also accused the defendant of “finding instructions on the Internet for the construction of a shrapnel bomb based on the explosion of triacetone triperoxide” that is often used by IS, and of producing a small amount of explosives.

Prosecutors also said the defendant made “numerous attempts” to buy weapons illegally from abroad and bring them to Austria.

Omar Haijawi-Pirchner, the head of the Security and Intelligence Unit, when the suspect was arrested, said he wanted to kill as many people as possible using knives or explosives he had made.

Vienna’s public prosecutors plan to continue the criminal case against an unnamed suspect in Wiener Neustadt, a city close to the Austrian capital.

A spokesperson for the public prosecutor’s office in Vienna confirmed to the Associated Press that the accused has been arrested. Austrian media identified the suspect as Beran A. and said he was arrested in August 2024.

Three suspects have been arrested and charged with this conspiracy including a boy who was convicted in a German court last year of preparing a serious act of violence and supporting a terrorist act of violence abroad. The Berlin court gave Mohammad A., a citizen of Syria, a suspended sentence of 18 months.

Austrian authorities canceled three of Swift’s shows scheduled for Vienna in August 2024 after they said they had foiled an apparent plot to target Eras Tour performances.

The US provided insufficient discretion in the decision to cancel the concerts. This move left tens of thousands Swift fansmany of them who had come to Vienna from somewhere else in the country or abroad specifically to see the exhibition, were overwhelmed. Concert organizers in Austria said they expected up to 65,000 fans at the Ernst Happel Stadium for each concert and around 30,000 spectators outside.

“The United States has a permanent focus on our work against terrorism. We work closely with partners around the world to monitor and disrupt threats. And so as part of that work, the United States is sharing information with Austrian partners to allow for the disruption of the threat of Taylor Swift’s concerts there in Vienna,” said the national security spokesman of the White House at the time John Kirby24 in August.