Police say the robber entered the Republic Bank at 1601 Market Street in Philadelphia on Friday, October 12, 2012 around 11:00 am and threatened the teller saying he had a gun.
He got away with an undisclosed amount of cash before fleeing on foot.
He is described as a white or Hispanic male in his mid 30's or early 40's, around 5'6" to 5'7" tall, stocky build, with bad skin and a receding hairline. He was last seen wearing a dark gray hooded sweatshirt and jeans.
Police believe that he is armed and dangerous.
Anyone with information is asked to call the Philadelphia Police Department or the FBI at (215) 418-4000.