The gunman who killed six people and wounded 15 others in a shooting at a crowded square in Poland died Monday after being shot by police during the attack, authorities said.
The 24-year-old suspect had been hospitalized in critical condition since Saturday's shooting in Krakow and underwent several operations before his death.
Polish prosecutors have opened an investigation into the killings and attempted killings, including attacks on police officers, as a possible terrorist offense.
Authorities said the gunman held far-right views, though investigators have not publicly established a motive for the attack.
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Police also discovered the bodies of the suspect's mother, father and sister at the family's home in Ostrowiec Świętokrzyski, roughly 93 miles northeast of Krakow, per reporting from The Associated Press. The three are believed to have died from gunshot wounds, though authorities have not confirmed the circumstances of their deaths.
The suspect, who was wearing military-style clothing and a bulletproof vest, drove into Krakow's historic Main Square on Saturday before opening fire, according to authorities.
Four women and two men were killed, including a British man and an Austrian woman. Five foreign nationals were among the wounded.
Two police officers injured while stopping the gunman remained hospitalized as of Sunday, though both were reportedly conscious.
The Associated Press contributed to this report.
