A man, 25, was on the sidewalk in the first block of West Polk Street at 3:45 a.m. when two people approached him, police said. A woman, a 25-year-old off-duty CPD officer, approached the group in a car and one of the two people who had approached the man on the sidewalk shot at her before she

Preliminary investigation indicated that a 25-year-old man was on the sidewalk when two unknown people approached him.

An off-duty Chicago police officer exchanged gunfire with two people near Printer's Row Saturday morning. No injuries were reported.