Dragonskolan has around 2,000 high school students and is one of Sweden's largest high schools.

During Tuesday, staff alerted the police about a suspected threat that was spread on social media.

A teenager was arrested and questioned on Tuesday.

The person was later released but is still a suspect.

The incident is classified as serious illegal threats and serious weapons offences.

Hear from the area manager of the high school and students about the incident in the video above.