Organizers have canceled three Taylor Swift concerts in Austria after authorities said they foiled a terror attack planned for the Vienna leg of her blockbuster Eras tour.

The extraordinary decision – which could come at significant cost to Vienna’s businesses – has devastated fans and renewed focus on the vulnerability of huge concerts as soft targets for terror networks and spree killers.

Tens of thousands of people rallied in Vienna on Saturday in protest against restrictions introduced to halt the spread of coronavirus in Austria, including mandatory COVID-19 vaccines and home confinement orders for the unvaccinated.

Around 1,400 police officers were on duty to oversee the protest, which attracted an estimated 44,000 people, and followed a similar demonstration in the Austrian capital last week.

Several thousand people marched through the Czech capital on Sunday, protesting a COVID-19 vaccination mandate for certain groups including people age 60 and over.

The participants didn’t wear face coverings or follow social distancing rules despite a request by police to do so. One person was detained.

The protesters, chanting “Freedom!” alleged their constitutional rights are being violated. They said they weren’t against voluntary vaccination but opposed a vaccine mandate.

Tens of thousands gathered in Austria’s capital Vienna to protest mandatory COVID vaccines and home confinement orders for those who have not yet received the jab.

Police said an estimated 44,000 people attended the demonstration on Saturday, the latest in a string of huge weekend protests since Austria last month became the first EU country to say it would make COVID-19 vaccinations mandatory.

A partial confinement since last month ends on Sunday for the vaccinated, but those who have not received the required doses will have to remain at home.