A 34-year-old man from the United States was detained in Germany earlier this week after allegedly making threats against Taylor Swift and boyfriend Travis Kelce, according to multiple reports.

The arrest of the stalker was made ahead of Swift’s first concert in Gelsenkirchen on Wednesday, according to the Associated Press.

Kelce was in attendance and was seen holding hands with Swift after the concert.

The threats were allegedly made on social media.

While the identity of the man remains unknown, he allegedly possessed a ticket for the concert and was detained “during entry checks to the event,” according to the AP, and will reportedly be help until Saturday — after Swift’s final show in the city.

It’s not the first time that Swift has dealt with a stalker.

David Crowe was arrested in New York City — where the singer has an apartment — twice across three days earlier this year.