The robbery happened at 5:35 p.m. at the WSFS Bank in the Suburban Plaza Shopping Center.
Police say the suspect entered the bank wearing sunglasses over an old-style hockey mask and was armed with handgun.
He obtained an undisclosed amount of cash and fled the bank on foot to a waiting vehicle.
The suspect is described as a male, wearing a dark colored hooded sweatshirt. He was described as being between 5'10" and 6'01" tall with a thin build.
The getaway vehicle was described as a small white compact four door car with a white male driver.
Anyone with information about this bank robbery is asked to contact Det. Fred Nelson at 302-366-7110 ext 136 or email firstname.lastname@example.org.. You can send an anonymous text message tip by texting 302NPD and your message to TIP411. Information can also be provided anonymously to Crime Stoppers at 1-800-TIP-3333 or via the internet at www.tipsubmit.com where a reward may be available.