CHICAGO (CBS) — A man was shot and critically wounded early Saturday in the Rosemoor community, police said.

At 2:54 a.m., the man was standing on the sidewalk in the 10100 block of South Calumet Avenue when someone came up and fired shots, police said.

The victim was taken to the University of Chicago Medical Center, where he was in critical condition, police said.

No one was in custody later Saturday morning. Area South detectives were investigating.