The incident took place on Saturday afternoon at the intersection of East 12 street and Elm Avenue.
Police say a 33-year-old woman was walking with her young daughter when a suspect approached her, punched her in the back of the head and fled on foot.
The victim sustained minor injuries.
The suspect is a male black, 5'7"-5'9", 170-185 lbs, with short braids, and was wearing a black wool cap, green jacket, and dark-colored jeans.
Anyone with information is asked to call Crime Stoppers at (800) 577-TIPS (8477).