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 at the Ernst Happel Stadium in Vienna.

According to BBC News, officials say the teen – who had previously pledged allegiance to the Islamic State group – confessed that he “intended to carry out an attack using explosives and knives”.

More than 195,000 people were expected to attend the three sold-out shows that were subsequently cancelled.

The 19-year-old is said to be the main suspect out of three.

A second suspect – a 17-year-old – was employed at a company which would have “provided services” at the stadium where Swift was to perform.

Meanwhile, a 15-year-old suspect has so far refused to talk to the authorities, and was “in the area” of the stadium when he was arrested.