The girl was pronounced dead at Little Company of Mary Hospital, according to Officer Michelle Tannehill, a spokeswoman for the Chicago police. Two other people were wounded.
The trio were shot about 8:15 p.m. during a vigil for a person shot Saturday night at the same location, at 89th and Justine streets, said Chicago Fire Department Cmdr. Frank Velez.
Velez earlier said that paramedics rushed a 20-year-old woman, a 16-year-old boy and an 18-year-old man to Advocate Christ Medical Center in Oak Lawn, where they were all in serious to critical condition, said Velez.
Saturday night about 5:20 p.m., a 23-year-old man was shot at the same spot. He was standing in front of a home when two people approached on foot and began firing. The man was shot multiple times in the torso and taken to the Little Company of Mary Hospital, where he was pronounced dead.
He was identified as Nahmar T. Holmes, of the same block where he was killed, said the Cook County medical examiner's office.
Earlier Sunday, a man in his late 20s was fatally shot on the West Side.
Sergio Zaragoza, of the 1700 block of North Karlov Avenue, was shot in the chest in the 1600 block of North Karlov Avenue in the Hermosa neighborhood about 3:10 p.m. said Officer Michelle Tannehill, a police spokeswoman and the Cook County medical examiner's office.
Zaragoza, 29, was pronounced dead at 3:47 p.m. at Mount Sinai Hospital, according to the medical examiner's office.