Two men were arrested Wednesday in connection with alleged planned attacks at major events in Vienna, Austria, including Taylor Swift's upcoming concerts.
One of the men arrested by Austrian federal and state police was a 19-year-old who allegedly pledged his allegiance to ISIS, authorities said at a news conference on Wednesday.
Officials said both men had become radicalized through the internet, and allegedly had specific and detailed plans on how to carry out the attacks.
When the 19-year-old was taken into custody, a bomb squad allegedly found chemical substances. Investigators are working to determine if the substances could have been used to build a bomb, authorities said.
Swift was scheduled to perform at the Ernst-Happel-Stadion in Vienna on Thursday, Friday and Saturday for the international leg of The Eras Tour, before organizers called off the events on Wednesday.
This story first appeared on NBCNews.com. More from NBC News:
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