An 18-year-old armed with a sword attacked Brinell School in Fagersta, killing one person and seriously injuring two boys. The incident triggered lockdowns, a crisis response and an expanding police investigation into the motive.

There was no immediate word on the attacker’s possible motive.

A sword attack at Brinell School in Fagersta injured three people and led to an arrest. The incident triggered a major emergency response as police probed the motive.