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 say the shooter who killed 10 people in the country’s worst mass shooting was connected to the adult education center where he opened fire with at least one rifle-like weapon

"There was blood everywhere," 16-year-old Linn told reporters at the scene of what has been described by Sweden's prime minister as the worst mass shooting in the country's history.

A gunman who killed 11 people, including himself, at an adult education centre in central Sweden may have been a student at the school, police said on Thursday, as they described chaotic scenes after the country's deadliest mass shooting as being like an "inferno".

A teacher has spoken of her horror after a gunman opened fire at an adult education centre in Sweden.Eleven people were killed in the shooting at the Risbergska School in Örebro, some 125 miles west of Stockholm,

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.

One day after the killings at an adult educational center, some gathered to lay flowers and come to grips with the violence.

Police confirm seven women and three men - aged between 28 and 68 - were killed in the country's worst mass shooting.

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.