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.”

Swedish police confirm around 10 people were killed at a school for adults on the outskirts of Stockholm. The gunman is believed to be among the dead.

Swedish police said that about 10 people, including the gunman, were killed during a shooting Tuesday at an adult education center. But a final death toll and a conclusive number of wounded hadn't yet been determined.