A shooting at an adult education campus in central Sweden on Tuesday left at least 10 people dead and injured an undisclosed number of others, in what the Swedish prime minister called the worst mass shooting in the country’s history.

The suspect was among the dead, the country’s justice minister, Gunnar Strommer, said. But authorities released few other details, including the person’s identity and a possible motive.

"We do not think there is any terror motive behind this, but it is too early in the investigation to say,” Roberto Eid Forest, head of the local police, said Tuesday evening. "We think we have the perpetrator,” he added, "but we are not ruling out anything.”