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."

Sweden’s right-wing government said on Friday it would seek to tighten gun laws in the wake of the country’s deadliest mass shooting at an adult education center where the attacker appeared to have used several of his own licensed rifles.

Swedish police have announced that "around" 10 people, including the gunman, were killed in a shooting at an adult education center in Orebro. The shooting happened at around 1 p.m. local time at Riskbergska School in Orebro,