The man, who has not been identified, was found near the intersection of Prospect Avenue and Norwood Park. Bystanders found him bleeding face-down in the roadway and tried to render aid, saying he was bleeding from his mouth and having trouble breathing.
Eyewitnesses think the man may have been tossed from a vehicle after a carjacking, but police did not immediately release details on the circumstances surrounding the death.
Paramedics transported the man to a local hospital, where he later died.
Shortly after the incident, police were seen a few blocks away on Flint Drive questioning several individuals and processing an SUV for crime evidence. It is unclear if the two crime scenes were related.