An 18-year-old man was shot to death Tuesday in south suburban Calumet City.

Rodney Nelson, of Riverdale, was shot at 1:37 p.m. in the 1400 block of Sibley Boulevard, according to the Cook County medical examiner’s office. He was pronounced dead about four hours later at Christ Medical Center in Oak Lawn.

An autopsy Wednesday found that Nelson died of a gunshot wound to the abdomen. The medical examiner’s office ruled his death a homicide.

Calumet City police did not respond to a request for details.

Read more on crime, and track the city’s homicides.