Police said the 24-year-old who opened fire in a city square in Poland, killing six people and wounding 15 on Saturday, died in the hospital Monday morning. The man had been in critical condition after police shot him to end the attack and had had several operations. The assailant drove through the square in the heart of Krakow’s Old Town on Saturday to start the attack. The square is a major tourist hub in the country’s second-largest city. Authorities also found the bodies of the assailant’s sister, mother and father at the man’s family home. They likely died from gunshot wounds.