19-year-old is said to have killed his parents and brother. The man's sister was seriously injured on Tuesday evening.
The suspect has German and Italian citizenship. The parents died after the alleged attack at the scene of the crime, an apartment building. They were 58 and 61 years old. The 19- year-old's sister also suffered serious stab wounds. She was taken to a clinic in a rescue helicopter. Her injuries were not life-threatening. The investigations are therefore ongoing.