It happened on February 13 inside the Devon Grocery Store on the 900 block of East Woodlawn Street.
The suspects were seen walking into the store at 6 p.m. armed with handguns.
One suspect jumped behind the counter while a second pointed a gun at a female customer and forced her to the back of a store along with a second employee.
The pair stole $303 from the registers along with $50 from the customer and a black Galaxy 4 cell phone.
They fled the scene on foot and were last spotted heading east on Woodlawn Street.
There were no reports of any injuries.
The first suspect is described as a black male, 21-25 years-old with a dark complexion, 5'9-5'11 tall and 220 lbs. He was wearing a dark blue hooded sweatshirt pulled up, a white t-shirt covering his face, blue sweatpants, and armed with a handgun.
The second suspect is described asa black male, 25-30 years-old with a dark complexion and thin build, 5'10-6'0 tall and 180 lbs. He was wearing a black hooded sweatshirt pulled up, white t-shirt covering his face, blue jeans, and armed with a handgun.
Anyone with information is asked to contact police at 215.686.TIPS (8477) or text a tip to PPD TIP (773847).