At least 10 people, including the gunman, were killed 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.

The shooting, at a center for adult education in the city of Orebro, was the worst mass shooting in Swedish history, the country’s prime minister said.

Police say around 10 people have died in a shooting at an education campus in the city of Orebro. It is the worst school shooting ever to happen in Sweden, where school violence is rare. The suspected gunman is believed to be among the dead. Details are still emerging, but this is what we know so far: