A deadly attack at a high school in Fagersta, central Sweden, has left at least one person dead and three others injured after a sword-wielding attacker entered the school.

The incident took place Friday afternoon at the high school, shortly after students returned from summer recess. Police received an alert about ongoing lethal violence and quickly deployed several patrols to the scene.

Authorities said the suspect was taken into custody after police intervention. Officers then entered the school, secured the premises and discovered a deceased person.

Two of the injured victims were reportedly teenage boys who suffered severe injuries, while another injured person was later released from hospital.

Reports have also raised questions about a social media account that allegedly posted an image of a sword shortly before the attack. Authorities are investigating the circumstances and possible motives behind the violence.

Sweden School Attack: Sword-Wielding Attacker Kills One, Injures Three In Fagersta

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Sweden School Attack: Sword-Wielding Attacker Kills One, Injures Three In Fagersta