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.

Swedish police said Sunday they were still struggling to establish the motive of the man behind the Scandinavian country’s worst mass shooting, five days after the tragedy. A gunman killed 10 people on Tuesday after entering the Campus Risbergska,

Sweden is set to tighten its gun laws, including a ban on certain semiautomatic weapons, after a mass shooting that left 11 people dead.

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.