Police are warning about two recent armed robberies in the South Side Washington Park neighborhood.
In each case, a suspect approached people, pulled out a nickel or chrome handgun and robbed them, Area Central detectives said in a community alert.
Both robberies happened this month in the 6100 blocks of South Michigan and South Indiana avenues, police said.
The suspect is described as a black man between 16 and 20 years old, between 5-foot-8 and 6-foot-1 and 145 to 170 pounds, police said.
Anyone with information is asked to call detectives at (312) 747-8380.