Świętokrzyska police: "Before 22:00, we discovered the bodies of three people in an apartment in one of the apartment buildings in the center of Ostrowicz Świętokrzyskie: a 53-year-old man and two women aged 52 and 21. They were the parents and sister of a 24-year-old man who was arrested in Krakow.
Injuries were found on the bodies, which were initially assessed as gunshot wounds. The bodies were secured for a detailed examination. Seven weapons were secured in the apartment.
Police officers, a forensics technician and a prosecutor were on the scene throughout the night.
For safety reasons, the residents of the apartment building were evacuated during the activity. They were allowed to return to their apartments after it was over.
Our actions are not limited to the apartment where the bodies were discovered. Searches are ongoing. ".