Sweden's worst mass shooting left at least 11 people dead, including the gunman, and at least five seriously wounded at an adult education center west of Stockholm. The gunman's motive hadn't been determined by early Wednesday as the Scandinavian nation — where gun violence at schools is very rare — reeled from an attack.

A yet to be identified shooter stormed a school in Sweden on Tuesday and killed no less than 10 people in what Ulf Kristersson, Sweden Prime Minister has declared as “worst mass shooting in Swedish history”.

Police say around 10 people have been killed in a shooting at an education centre in central Sweden, including the suspected gunman. Prime Minister Ulf Kristersson described Tuesday's attack at Risbergska school in Orebro, 200km (124 miles) west of the capital city Stockholm, as the "worst mass shooting in Swedish history".

About 10 people, including the gunman, were killed on Tuesday at an adult education center in what Sweden’s prime minister called the country’s worst mass shooting. But a final death toll, a conclusive number of wounded and a motive hadn’t yet been determined hours later.

A mass shooting at an adult educational facility in Sweden on Tuesday was the deadliest such incident in the country’s history, with 11 people killed, including

The shooting happened on the outskirts of the city of Orebro, which is located about 200 kilometers (125 miles) west of Stockholm. | ITV National News

Police in Sweden said "about 10" people were killed in a shooting at an adult education school . The shooting occurred at Campus Risbergska in Örebro, Sweden, the city said in a statement. Police say the shooter is believed to have been killed.