Around 10 people were killed in a school shooting in Örebro. The damage at the crime scene was so extensive that investigators were unable to be more definitive, said Roberto Eid Forest, head of the local police.

Swedish Prime Minister Ulf Kristersson and King Carl XVI Gustav have led tributes to the victims of a deadly shooting at an adult school in the city of Orebro. A police investigation is underway.

Deadly shooting attack in an adult education center at Campus Risbergska happened on the outskirts of the city of Orebro, which is located about 200 kilometres (125 miles) west of Stockholm. The perpetrator reportedly acted alone.

OREBRO, Sweden (AP) — 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 attack at an adult education centre was described by the country's prime minister as the worst mass shooting in Sweden's history.

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 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.

Sweden's King Carl XVI Gustaf, Queen Silvia and Swedish Prime Minister Ulf Kristersson visited an education center where at least 10 were killed.

Survivors of Sweden's worst mass shooting on Wednesday recalled trying to save the lives of their comrades at a school for adults in Orebro, a day after a gunman killed 11 people on what the prime minister called a "dark day" in the country's history.