About 12:55 a.m., police were called to the 2300 block of South California Avenue in the Little Village neighborhood, officials said. A 23-year-old said he was on foot when two people started chasing him and shooting at him. He was struck in the chest and the back, though it was unclear whether that was two gunshots or one, creating both entrance and exit wounds, according to preliminary reports. The man, who was known to police, was taken by friends to Mount Sinai Hospital, where he was listed in critical condition. The gunman or gunmen fled on foot, the man told investigators. No arrests have been made.