Imani Ringgold, 20, was shot multiple times in the 5900 block of Market Street.
Philadelphia Police Chief Inspector Scott Small said surveillance video shows three people getting out of a dark-colored SUV and opening fire around 6:20 p.m.
Ringgold was reportedly walking along Market Street carrying a box of pizza when she was shot.
"You can clearly see the front-seat passenger run up onto the sidewalk, stand over this 20-year-old female as she's lying on the sidewalk and fire shots from point-blank range," Small said.
Police say Ringgold was shot in the face, torso, hip and leg. She was rushed to an area hospital, where she was later pronounced dead.
Two additional victims, a 24-year-old man and a 55-year-old woman, were each hit once in the lower extremities and were taken to the hospital. Both were reported to be in stable condition.
The suspects got back in the SUV and fled eastbound on Market Street.
No arrests have been made. The motive for the shooting remains unknown.
Anyone with information can call or text Philadelphia police at 215-686-TIPS (8477) or submit an anonymous tip online.