Taylor Swift’s Eras Tour concerts in Austria were canceled after two men were arrested for allegedly plotting terror attacks on her shows in Vienna.

The “Cruel Summer” singer was scheduled to perform Thursday, Friday and Saturday at Ernst Happel Stadium.

Event organizer Barracuda Music shared on Instagram that “we have no choice but to cancel the three scheduled shows for everyone’s safety.”

Taylor’s website shared that all tickets will be automatically refunded within the next 10 business days.

A large police operation was conducted early Wednesday in Ternitz, a town of about 15,000 people in the Neunkirchen district of Lower Austria, according to the Austrian daily newspaper Der Standard and The Associated Press.

A man was taken into custody, and special forces conducted a search of his home spanning several hours, police spokesman Johann Baumschlager told the newspaper. He added that several nearby houses and a section of a retirement home needed to be evacuated, and some roads were closed as a result. Investigators are analyzing several chemical substances seized at the suspect’s home.

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Taylor Swift in a green dress looks up in awe during her Eras concert

Taylor Swift canceled Vienna shows following foiled terrorist attack.(Fernando Leon/TAS23/Getty Images)

Representatives for Swift did not immediately respond to Fox News Digital’s request for comment.

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Investigators believe one of the suspects had become radicalized online and had sworn an oath of allegiance to the current leader of the Islamic State (ISIS), Der Standard reported.

At a press conference on Wednesday evening, General Director of Public Security Franz Ruf, joined by Vienna State Police President Gerhard Pürstl, reportedly confirmed a 19-year-old “Austrian citizen” was arrested in Ternitz that morning, while a second man was arrested in Vienna in the afternoon.

A girl poses in front of a Taylor Swift concert sign in Warsaw

A Taylor Swift fan has her photo taken outside the national stadium ahead of a concert in Warsaw, Poland, on Saturday.  (Aleksander Kalka/NurPhoto via Getty Images)

Kronen Zeitung, another Austrian newspaper, described one of the suspects as an Austrian with North Macedonian roots who lived with his family in Ternitz.

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The report said the two men carried out “specific preparatory actions for a terrorist attack,” and the 19-year-old specifically was aiming to target the Swift concerts.

Taylor Swift fans in Poland

Taylor Swift fans gather at a traffic stop in Warsaw, Poland, on Saturday.(Jaap Arriens/NurPhoto via Getty Images)

Pürstl reportedly said that with the now “minimized danger,” the concerts scheduled for Thursday, Friday and Saturday at Ernst Happel Stadium will still take place but under increased security measures.

He also recommended concertgoers arrive an hour earlier than scheduled to account for potential delays.