The teenager, said to have North Macedonian roots, is considered the main suspect, and worked closely with a 17-year-old Austrian, general director for public security Frankz Ruf told the broadcaster ORF.
The 17-year-old, who has Turkish and Croatian roots, had started a job at the concert venue days before the event was cancelled over the terror threat, according to officials.
Two teenagers, aged 19 and 17, were arrested over plans to carry out a terror attack at a Taylor Swift concert set to take place in Vienna this weekend.
news.sky.com