An 18-year-old student is in custody for four weeks following a school attack in Fagersta, Sweden, on Friday afternoon. The attack involved a sword and resulted in the death of a 17-year-old girl and injuries to three other students. The suspect, also a student at the high school, was apprehended by police at the scene. He is currently being held on suspicion of murder and attempted murder. Swedish prosecutors confirmed the detention order. The incident has shocked the community and prompted a police investigation into the motives behind the violent act. Authorities are providing support to the school and affected families.