Swedish news outlets identified the shooter as Rickard Andersson, a 35-year-old from Orebro, the city where the shooting occurred, although the police have not publicly confirmed that.

Police said they do not know the motive but do not believe it is terrorism, adding they "had no warning sign" about the attack. Officers are working to identify the perpetrator and the victims.

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.