Police say an unknown man walked into the Citizens Bank at 3200 Red Lion Road around 9:53 a.m.and approached a teller armed with a handgun demanding money.
After taking an undisclosed amount of money, the suspect fled on foot in an unknown direction.
The suspect is described as a white male, 30 years old and medium build.
He was wearing a yellow shirt, dark colored shorts and an Eagles hat.
Anyone with information should contact the police at 911 immediately.
To submit a tip via telephone, dial 215.686.TIPS (8477) or text a tip to PPD TIP or 773847