At least 13 people were injured as a result of shooting at a crowd in south Chicago, ABC7 TV channel quoted a source in the city police as saying. Two unidentified men opened fire from a passing red SUV at a large group of people in the Princeton Park area. At least 13 people were injured in the shooting, including a 17-year-old teenager. One of the injured, a 26-year-old man, is in critical condition. The attackers fled.