It happened around 5:37 p.m. Saturday at the intersection of 27th and Tatnall streets.
Police located four gunshot victims at the scene.
A 15-year-old male, a 21-year-old female, and a 21-year-old male were taken to the hospital for treatment of minor injuries and are listed in stable condition.
An 18-year-old male was taken in serious but stable condition.
The incident remains under investigation.
Anyone with information about this incident is encouraged to call (302) 576-3961.