Michal Oksinski, 24, a turner by profession, was identified as the perpetrator of yesterday afternoon's massacre in the country's second city and had a clean criminal record, a valid gun license, and lived with his family in Ostrowiec Swietokrzyski, a town located about two hours' drive from Krakow.

The young man had studied mechanics at a vocational school. As a boy, former classmates and a local radio station reported, he socialized little. He often drew pictures of people hanging or armed during class: "And when we asked him about it, he said it was an attack on a school and that he was the assailant," one woman said.

Before his rampage in Krakow, the 24-year-old man massacred his family . His 53-year-old father, 52-year-old mother, and 20-year-old sister were found dead in the apartment where he lived, following his indiscriminate attack on the crowd in Krakow's Main Market Square, which left 6 dead and 16 injured .

When they were found, all three bodies showed signs of gunshot wounds, investigators said. Michal O., along with his father, was a member of a shooting range, Polish media reported.

"Often on Sundays, while I was busy in the kitchen, I would see a man, a father and his son, getting into a car, both dressed in camouflage, carrying bags. But I never imagined that those bags could presumably contain weapons," a neighbor of the family told reporters, quoted by TVN24. "I didn't have the slightest suspicion that my neighbor could turn out to be a torturer, a murderer. I had no such suspicion," he added.

"Ultra-nationalist"

Interior Minister Marcin Kierwinski said at a press conference that initial investigations indicate that he was "an ultra-nationalist" inspired by "far-right ideologies," although this information "still needs to be fully verified."

The victims

A 51-year-old Austrian woman, a 32-year-old British citizen, three Polish women aged 47, 53 and 61, and a Polish man in his 50s were killed in the attack.