The incident happened around 1:00 a.m. on the 5100 block of Walnut Street.
Police say a 33-year-old employee, who was out on a delivery, returned to the store to find two males wearing dark hoodies inside the store with a 27-year-old female employee.
The two suspects announced a robbery and struck the male worker in the head and the female worker in the nose with a gun.
After obtaining $800 the suspects fled the scene in a dark colored vehicle.
The female employee suffered a broken nose. Both victims were transported to the Hospital of the University of Pennsylvania for treatment.
So far, no arrests have been made.
