In what officials are calling a major counter-terrorism breakthrough, a teenage suspect in Germany has been charged for his role in a foiled terrorist plot targeting pop superstar Taylor Swift’s Eras Tour concert in Vienna. The suspect, identified as Mohammad A., is accused of aiding in the orchestration of an ISIS-inspired attack by translating bomb-making materials and facilitating communications for the primary plotter, an Austrian national.

Authorities allege that Mohammad A., a Syrian-born teenager, played a key role in advancing plans to carry out mass violence at a scheduled Swift concert in Austria. German prosecutors stated that the teen provided “substantial assistance” to the primary suspect, a 19-year-old Austrian man, by interpreting detailed instructions on how to build explosive devices and translating a sworn oath of allegiance to the Islamic State terrorist organization.

The charges leveled against the teenager include supporting a foreign terrorist organization and assisting in the preparation of a “serious act of violence endangering the state.” He is currently being held in custody as investigations continue across multiple jurisdictions, including Germany and Austria.

Photo Source: Roland Schlager/AFP/Getty Images via NBC News The primary suspect was apprehended earlier in Austria after law enforcement discovered a disturbing cache of weapons and materials believed to be intended for an imminent attack. Police recovered machetes, knives, explosive chemicals, and programmable timers from his residence. Further searches in the home of his parents in the small town of Ternitz, approximately 40 miles southwest of Vienna, revealed ISIS propaganda material, further solidifying fears of extremist radicalization.

The case is being treated as a coordinated attempt to carry out a high-profile attack at one of Europe’s largest and most visible pop culture events. Taylor Swift’s Eras Tour has drawn global attention, with massive crowds and heightened security at every stop.

Last August, amid escalating security threats, Swift canceled three scheduled performances in Vienna. Though the reason was not immediately disclosed at the time, Austrian police later confirmed the arrests of two men allegedly planning terrorist acts within the city, including the concert venue.

On August 21, Swift broke her silence in a deeply personal message posted to her social media platforms. “The reason for the cancellations filled me with a new sense of fear, and a tremendous amount of guilt because so many people had planned on coming to those shows,” she wrote. “But I was also so grateful to the authorities because thanks to them, we were grieving concerts and not lives.”

Viennese police initially reported the arrests of two suspects in connection with the plot. One of them, a 17-year-old, was later released without charges. The case remains open as officials investigate the extent of the network involved and determine whether additional suspects are at large.