One killed, three wounded in sword attack at Swedish high school

A sword-wielding man attacked a Swedish high school, resulting in one fatality and three injuries. The incident occurred at the school, though the specific date and time are not provided in the article. The motive behind the attack is also not stated. The article focuses on the immediate aftermath of the violence, confirming the number of casualties. Further details regarding the perpetrator or the circumstances leading to the attack are not included in the provided content.