The 24-year-old suspect, who opened fire in Kraków’s Main Market Square on Saturday, died in hospital early Monday, according to Malopolska Policja. The attack killed six people and injured 15, with the suspect described by Interior Minister Marcin Kierwiński as being “fascinated by far-right ideologies.”

Among the six killed were three Polish women, one Polish man, a British man, and an Austrian woman. Five foreigners were among the wounded, from the U.K., Portugal, Russia, Germany, and Austria. Two police officers were also injured, one of whom had been in a coma but regained consciousness by Sunday. “If it weren’t for the efficient and selfless intervention of these two young men, the number of victims could have been significantly higher,” said Krzysztof Jan Klęczar, the Malopolska regional governor.

Police found the bodies of the suspect’s father, mother, and sister at his family home in Ostrowiec Świętokrzyski, about 93 miles northeast of Kraków. The family members likely died from gunshot wounds. The suspect’s father owned over 10 guns legally, and authorities seized 11 weapons in total, including four found with the attacker in Kraków.

The attack took place in Kraków’s Main Market Square, a major tourist hub. The city has declared two days of national mourning, and the traditional St. Mary’s Trumpet Call was paused for the first time since World War II in tribute to the victims. “Our city will never be the same,” said Weronika Filar, a 27-year-old resident.

The suspect wore military-style clothing and a bulletproof vest and drove into the square at high speed before opening fire. He continued shooting even after being wounded by police. Justice Minister Waldemar Żurek said the suspect “acted with the aim of seriously intimidating a large number of people.”

Prosecutors have launched a terrorism investigation and are examining the suspect’s electronic devices to determine if he was inspired by or connected to any group. Government spokesman Adam Szlapka urged restraint in commenting on the motive until the investigation is complete. “Until the matter is fully clarified and the authorities are in possession of complete information, it is best to refrain from making comments,” he said.

Witnesses described the horror of the attack, with one tourist from Brussels writing on Facebook that she and her family “ran for our lives and managed to hide from the bullets flying around.” Mourners left candles and flowers in the square, with locals expressing both grief and a determination to resist fear.

Authorities launched a blood donation appeal for the most seriously wounded officer. Klęczar praised the two officers who stopped the attacker, calling their actions heroic and noting that their intervention likely prevented more deaths.