About 10 people including the gunman have been killed at an adult education center in what Sweden’s prime minister called the country’s “worst mass shooting.”

Eleven people are dead after a rampaging gunman opened fire at an adult education centre in central Sweden, in what has been dubbed the country’s worst ever mass shooting.Armed police were scrambled to Risbergska School,

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.