The robbery happened around 3:07 p.m. at the TD Bank branch at 1240 Bethlehem Pike in Flourtown.
Police say two men entered the bank and approached the tellers. One man brandished a gun and demanded money while the other put the cash into a canvas bag.
The two men the fled on foot toward Jones Avenue. Investigators say they may have fled in a grey or gold car.
The gunman is described as a black male in his late 20s standing about 5'8" to 5'10" tall. He has a medium build with a short beard or goatee. He was wearing a blue hat with KC on the front, a white shirt and dark pants.
His accomplice also described as a black male in his late 20s also standing about 5'8" to 5'10" tall. He has a medium build and was wearing a red hat, a Nike shirt and tan pants.
These subjects are considered armed and dangerous.
Anyone with information is asked to call the FBI at 215-418-4000 or the Springfield Township Police at 610-836-1601.