One day after the killings at an adult educational center, some gathered to lay flowers and come to grips with the violence.

Sweden’s prime minister said the attack at the Risbergska School was the worst mass shooting in country’s history

The shooting was at Campus Risbergska - a type of school for adults known as Komvux in Swedish, which is primarily for people who did not finish primary or secondary education. There are other schools also on the campus. Teachers have described hearing shots ring out, leading to them fleeing classrooms or barricading themselves inside.