Authorities in Austria have arrested a 19-year-old man in Vienna for allegedly plotting an attack in connection with an upcoming Taylor Swift concert. A second person has also been arrested in the Austrian capital, who was believed to be in contact with the first suspect. Police are looking for a further three people in combination with the attack. Austria’s top public security chief Franz Ruf said that authorities were made aware of preparations for such an attack, and that the suspect’s focus had been the upcoming concert. Although the plan had been foiled, there remained an “abstract threat…