FBI spokesman Garrett Croon said the non-take over robbery happened around 9:45 a.m. at the Byline Bank at 1401 W. Belmont.
Officials described the suspect as a white male 20 through 35 years old, 6-foot-2 to 6-foot-3 and weighing about 170 pounds. He is also described as having blue eyes, reddish or blond facial hair and a "medium size mustache."