So, it turns out that it was only one guy who allegedly was born in Germany. Probably not an islamistic terror attack but rather a rampage of a former mobbing victim. At least that's hearable from a certain witness-video that spread over Twitter. Still too early to take everything as facts. It's almost 2am right now, we have to wait for the morning to get more confirmed information I guess.
Right now the news say there are 10 people dead. 9 were shot by the killer and then the killer shot himself before the police could arrest him. The police said that the people are allowed to leave their houses again and buses are driving around again as well.