An 18-year-old man armed with a sword carried out the attack at the Brinell School in Fagersta, northwest of Stockholm, while classes were in session on Friday. One person was killed and three others were wounded, two of them severely.

The attack took place at the Brinell School in the city of Fagersta, northwest of the capital, Stockholm, while classes were in session, with about 400 to 500 students, officials said.