CNN — 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.

Austrian security officials say a 19-year-old arrested on Wednesday was planning to kill "a large crowd of people" in a suicide attack at a Taylor Swift concert in Vienna.

Officials say the teen - who had previously pledged allegiance to the Islamic State group (IS) - confessed that he "intended to carry out an attack using explosives and knives".

Both suspects in a foiled plot to attack Taylor Swift shows in Vienna appeared to be inspired by the Islamic State group and al-Qaida, Austrian authorities said Thursday, and investigators found bomb-making materials at one of their homes. Officials said one of the two confessed to planning to “kill as many people as possible outside the concert venue.”

The 19-year-old Austrian who masterminded a foiled plot to attack Taylor Swift fans at a concert in Vienna with a bomb or knife had pledged allegiance to the Islamic State militant group, authorities said on Thursday.

The main suspect, who has North Macedonian roots, made a full confession in custody, Austria's general director for public security Franz Ruf told a news conference.

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.

Police say they have narrowly foiled an ISIS plot to attack a Taylor Swift concert in Austria — and there could still be a threat to the super star’s European shows.

Two suspects — a 19-year-old living in his parents’ house near Vienna, along with another man — were arrested Wednesday after police raided the home, according to the Austrian outlet Kronen Zeitung.

A bomb squad found various chemicals and substances potentially being used to make explosives, and evacuated the home.

Nearly 100 illegal immigrants on the terror watch list have been released into the United States during the Biden administration, while Border Patrol agents have encountered migrants on the watch list from dozens of different countries, a new House report is revealing.

U.S. Border Patrol encountered over 250 migrants who were on the terrorist watchlist over a two-year stretch, with at least 99 of them released into the country, according to a Congressional report released Monday.

The claims have been made by the Republican-led House Judiciary Committee in a new report, which blames the Biden administration for allowing suspected terrorists from three dozen countries into the U.S.

The Biden administration has caught and released at least 99 illegal immigrants whose identities matched the terrorism watch list, according to a congressional report Monday.

They were caught by the Border Patrol along the southern border from 2021 through 2023 and were subsequently released as part of the Biden administration’s more relaxed approach to immigration, the House Judiciary Committee said.

Another 34 illegal immigrants flagged by the watchlist were still being held as of June.

 At least 37 civilians were killed and 212 were injured in an explosion at a popular beach restaurant in the Somali capital late on Friday, the health minister said, an attack the government blamed on militant Islamist group al Shabaab.

Ali Haji told a press conference that 11 of those injured in the attack in Mogadishu were in a critical condition.

It was the deadliest attack in the Horn of Africa country since twin car bombs detonated near a busy market intersection in October 2022, killing at least 100 people and wounding 300 others.