A sword attack at a high school in Fagersta, a small town of around 12,000 people located roughly 170 kilometres north-west of Stockholm, has left one person dead and three others injured. Police were called to Brinell School — which has approximately 450 students — shortly after 14:00 local time on Friday, where they confronted an 18-year-old attacker. Officers shot the suspect in the leg before arresting and detaining him. His identity has not been publicly released, and investigators are working to establish a motive.

Among the injured were two teenage boys who sustained serious wounds and were hospitalised — Swedish media reported their ages as 12 and 17 — along with a third victim under 18 and a fourth person with minor injuries. One of the seriously injured was reportedly taken into emergency surgery. According to local media, the suspect was a former student of the school, dressed in a helmet at the time of the attack, and had previously been convicted of assault. Police carried out searches at two addresses linked to him. A crisis centre was opened by the municipality for residents and those affected, and eight nearby schools were placed under lockdown, a measure that was lifted by early evening.

Swedish Prime Minister Ulf Kristersson described the incident as "serious" and said authorities did not yet know what motivated the attack, urging people to allow police and emergency services to work undisturbed. King Carl XVI Gustaf said he received the news "with dismay and sadness," adding that his thoughts were with those affected and their families. A state of high alert was declared in the Västmanland region, the county in which Fagersta is situated.

The attack comes at the start of a new school term — students at Brinell School had returned to class only days earlier. It also follows a period of heightened concern about violence at Swedish educational institutions. In February 2025, Sweden suffered the worst mass shooting in its history, when ten people were killed at an adult education centre in Örebro, prompting the government to tighten the country's gun laws. In 2022, two teachers were killed in a violent attack at a secondary school in Malmö, and in 2015, a teacher and a pupil died in a sword attack at a school in Trollhättan — an incident later found to have been racially motivated. While such attacks remain relatively rare in Sweden, Friday's events have again raised urgent questions about security in the country's schools.