Six people were killed and several others injured when a gunman opened fire in central Krakow, Poland's second largest city, on Saturday.Footage authenticated by BBC Verify shows about a dozen people running inside two buildings before a black car with its front window open passes, followed by a police car.Another video shows the moment that gunshots were heard in the city's main market square.Poland's interior minister described the suspect - a 25-year-old Polish citizen - as being inspired by "far-right ideologies"; police said he used "military weapons" in the attack. Follow live updates on this story.