The incident happened just after 8:30 p.m. on the 5000 block of Rising Sun Avenue.
Three males were captured on surveillance video hanging outside of a Gulf gas station.
Police say they were waiting for the19-year-old victim to exit the station.
The three suspects can be seen walking along the side of the building, waiting for the victim.
He walks pass the suspects and they pull out handguns, demanding money or they will shoot him, police say.
They allegedly steal $4.00, a transpass, photo ID, iPod with headphones, jacket and sweater then flee in an unknown direction.
A fourth person is seen talking to the suspects before the robbery and is considered a person of interest, police say.
One suspect is described as a black male, 19-20 years-of-age, 5'8" tall, thin build, mustache and dark complexion. He was wearing a blue puffy coat, black jeans and black boots. He was armed with a silver .22 caliber handgun.
The second suspect is described as a black male, 19-20 years-of-age, 5'9" tall, dark complexion, and unknown tattoo between his eyes, face and hands. He was wearing a dark colored hooded sweatshirt, black skully, black pants and black boots. He was armed with a black 9mm handgun.
The third suspect is described as a black male, 19-20 years-of-age, 5'9" tall, and husky build. He was wearing khaki camouflage pants. He was armed with a silver .22 caliber handgun.
Anyone with information is urged to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.