A 24-year-old Polish man opened fire with a semi-automatic rifle from his car in the Main Square of Krakow's Old Town on Saturday. The attack in the major tourist hub killed six people, including a Briton, and injured between 15 and 17 others.
Police later discovered the bodies of the suspect's father, mother, and sister at his family home in Ostrowiec Świętokrzyski. The shooter was wounded by police officers during a shootout and arrested minutes after the attack in the square. After undergoing several operations in critical condition, the suspect died in the hospital on Monday morning.
Polish prosecutors have opened a terrorism investigation into the mass shooting, which the defense minister characterized as an act of terror. Authorities stated that the gunman was fascinated by and inspired by far-right ideologies.
Poland declared two days of national mourning starting November 8 to honor the victims. As mourners left candles in the market square, police bolstered security following the unprecedented shooting that shocked a country that had prided itself on being safer than many of its Western European neighbors.