They say Wednesday around 3:30 p.m., the Bank Trust branch located in the 400th block of North Dean Road was robbed.
The suspect was armed with a black semi-automatic handgun, then fled with an undisclosed amount of cash.
No injuries were reported, but the suspect is described as a black male in his early thirties, approximately 6'00" in height, and 180 pounds.
He had a short beard and was wearing a blue or purple baseball cap, blue jeans, white tennis shoes, and a shirt with wide red and blue horizontal stripes.
It's believed the suspect fled in a white service-type truck with a toolbox bed.
Anyone with information regarding this crime is asked to call the Auburn Police Division at (334) 501-3140 or anonymously on the tip line at (334) 501-7337.