Officials say a masked man wielding a sword has killed a teacher and a boy and wounded two others at a school in Sweden before being shot by police.
The attack took place in the morning on October 22 in the Kronan school in Trollhattan, near Goteborg, Sweden's second-largest city.
Local media showed what it said was a picture of the assailant carrying a sword and dressed in a black trench coat and helmet, posing for pictures with students shortly before the attack.
"We thought it was a joke, a Halloween prank or something, but it wasn't," one witness student told TV4.
Local media said the suspect's social media accounts showed extreme right-wing tendencies.
Based on reporting by AP and Reuters