A 17-year-old boy was shot in both legs in a robbery in a Park Manor neighborhood alley on the South Side, police said.
He was wounded about 9:25 p.m. in the 6700 block of South Prairie Avenue.
The boy told police he was robbed of $500 by a man wearing all-black clothing.
Police found two shell casings at the scene.
The boy was taken to John H. Stroger Jr. Hospital of Cook County and was in critical condition, police said.