Police are looking for the person responsible for physically attacking a woman and shooting a man who tried to stop the West Side attack, police said.
The gunman fled after the 12:15 a.m. incident in the 1300 block of South Lawndale Avenue, police said.
The 21-year-old man suffered a graze wound to the neck when he tried to stop the gunman, who was "physically attacking" a woman, police said.
The 21-year-old was taken to Mount Sinai Hospital where he was listed in good condition, police said.
The block was quiet late Wednesday morning as many neighbors sat on their porches. No one had heard about the shooting overnight.
A Chicago police pod camera is positioned directly above the intersection.
Area 4 detectives are investigating but no arrests have been made.