The incident happened shortly after 4:00 p.m. in the 4600 block of Frankford Avenue.
Police say the suspect managed to get away with a safe containing an unknown amount of money.
The suspect did not fire any shots and no one was hurt.
He is described as a light complexion black man, 5'7" tall, 140 pounds and clean shaven.
He was seen wearing a dark hooded sweatshirt, jeans and a red cap.
Anyone with information should contact the police.