Six people killed in attack probably inspired by far right, according to officials, as police say suspect’s parents and sister found dead at his home

Polish prosecutors have opened a terrorism investigation after a 24-year-old man opened fire in a busy market square in Kraków, killing six people including a Briton and injuring 17, in an attack that authorities said was probably inspired by far-right ideologies.

Police confirmed on Sunday that three people found dead at the gunman’s home after the attack on Saturday afternoon were his father, 53, mother, 52, and sister, 21.