An American man who made threats against on social media was detained ahead of her first concert in the German city of Gelsenkirchen and will be kept in custody until her shows there are over, police said Thursday.

The suspected stalker, a 34-year-old whose name wasn鈥檛 released, had a ticket to Swift鈥檚 concert at Gelsenkirchen鈥檚 Veltins-Arena on Wednesday, police said in a statement. They said that, because an initial investigation couldn鈥檛 entirely rule out a risk, he was detained during entry checks to the event.

Police said the man had made threats against Swift and her partner on social media. They said he had been detained following tips from organizers of the event.

The American superstar has shows in Gelsenkirchen on Wednesday, Thursday and Friday as part of her Eras Tour. A local court ordered the suspected stalker kept in detention until Saturday, police said.

They added that there was no danger at any point to Swift or to the audience. Wednesday evening鈥檚 concert, attended by about 60,000 people, went peacefully.

Ahead of the concerts, Gelsenkirchen put up signs temporarily 鈥淪wiftkirchen鈥� and honored the singer on a 鈥淲alk of Fame鈥� that commemorates local celebrities.

After Gelsenkirchen, Swift plans concerts in two other German cities, Hamburg and Munich.

READ ALSO: