BERLIN -Taylor Swift's three concerts in Vienna this week were cancelled after government confirmation of a planned attack at the stadium, the organizer said late on Wednesday.

"With confirmation from government officials of a planned terrorist attack at Ernst Happel Stadium, we have no choice but to cancel the three scheduled shows for everyone’s safety," Barracuda.music said in a post on Instagram, adding all tickets would be automatically refunded.

Austrian police on Wednesday detained two people suspected of plotting attacks on concerts, Franz Ruf, director general for public security, said at a news conference on Wednesday evening.

"During our investigations, we identified preparatory actions and noted that the 19 year-old suspect had a particular focus on the Taylor Swift concerts in Vienna," Ruf said, adding that the suspect, an Austrian citizen, had pledged allegiance to Islamic state.

Police searched the residence of one of the suspects in Ternitz, Lower Austria, and is analysing items from the home.

Three Taylor Swift concerts ad scheduled to take place In Vienna from Thursday to Saturday with police expecting around 65,000 attendees each day.

  - Reuters