Officials in Sweden have vowed to determine why a man killed 10 people, and apparently himself, in an unprecedented attack that's shaken their "society to its core."

Everything we know so far about campus attack which left 11 dead - Sweden’s prime minister said the attack at the Risbergska School was the worst mass shooting in country’s history

Police urged the public to stay away from the district of Västhaga, where the center is located, with students being accommodated in other schools.