The king and queen visited the scene of the tragic event that occurred on Tuesday and Swedish flags were flown at half-mast to honor the victims.

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."

People lit candles Thursday at the site of Sweden’s worst mass shooting, which left at least 11 people dead, including the gunman, and at least five seriously wounded at an adult education center west of Stockholm.