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."

Police in Sweden said Tuesday that "about 10 people" were killed in a shooting earlier in the day at a school for adults in the city of Orebro, west of Stockholm.

Swedish Police have confirmed they are not ruling out the possibility that the mass school shooting was racially motivated as it emerged that the 10 people killed are of multiple nationalities. When asked if they have ruled out the possibility the attack was racially motivated,

Swedish police said the gunman in the country’s worst mass shooting was connected to the adult education center where he opened fire Tuesday, killing 10 other people

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 centre where the attacker appeared to have used several of his own licensed rifles.