A third teenager has been arrested in connection with planning to attack Taylor Swift's Eras Tour.
Authorities in Austria confirmed that an 18-year-old suspect was arrested on Thursday after a 19-year-old Austrian with North Macedonian roots and a 17-year-old with Turkish and Croatian roots were arrested earlier in the week.
The third suspect is reported as an Iraqi citizen, and Austrian Home Secretary Gerhard Karner has stated that the teen is "not directly connected to the attack plans".
Mr Karner stated that the third suspect had, however, been in contact with the main 19-year-old suspect - who was arrested on Wednesday.
Sky News adds that a fourth teenager, aged 15, was questioned by police, but has not been arrested.
Taylor had planned to perform her record-breaking Eras World Tour at the Ernst Happel Stadium in Vienna this week over three nights from Thursday until Saturday.
The gigs were pulled after the plot to attack the venue was foiled on Wednesday - with reports claiming one of the suspects had been hired to work as part of the security team operating at the venue.
It has also been reported two of the suspects vowed allegiance to the terrorist organisation ISIS (Islamic State of Iraq and Syria) and that they had been radicalised by online content.
Addressing the plot - which included plans to stab music fans and detonate a bomb - United Nations spokesperson Alessandra Vellucci said on Friday that it was a, "good demonstration that radicalisation of people through the use of social media is really a concern".
