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

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."

Swedish police say 11 people have died in a shooting at an adult education centre in the city of Orebro. It is the worst school shooting ever to happen in Sweden, where school violence is rare. The suspected gunman is among the dead. Details are still emerging, but this is what we know so far: