Sweden just experienced the worst mass shooting in its history. Here’s what we know

At 12:33 p.m. local time (6:33 a.m. ET) on Tuesday, police received reports of a shooting in Örebro, a city about 160 kilometers (100 miles) west of the capital, Stockholm.

The shooting occurred at Campus Risbergska, a school for adults who have not completed earlier stages of education. Such facilities are known as a Komvux in Sweden. Komvuxes provide vocational training, Swedish language classes and other courses for adults seeking the qualifications needed to gain employment. They are also essential services for Sweden’s refugee and migrant populations.

At least 10 people were killed and six were injured in the attack, police said. The attacker also died.

Police said that the attacker was not known to them, that he was not connected to any gangs and that he was not believed to be acting based on ideological motives.

Police said that the attacker also shot at officers after they arrived at the campus. In a press conference Wednesday, police said that when they found the attacker, he was already dead and that it appears that he shot himself. The attacker has not yet been identified by authorities.

Read more: CNN