The volley of more than 50 shots erupted around 10:30 p.m. on the 1500 block of North Stillman Street, a narrow block of rowhouses tucked between Girard Avenue and Poplar Street. The young woman was hit in the arm, according to police, and was taken to a hospital where she was listed in stable condition.

Investigators believe at least two people fired the barrage, and police said the weapons involved included at least one rifle and other semi-automatic firearms. No arrests had been announced as of Wednesday morning, and police did not immediately release a description of the shooters or a possible motive.

Detectives are leaning on the neighborhood's surveillance network. Police said there are several cameras in the area and that footage is being reviewed in an effort to identify the people responsible.

The shooting adds to a grim pattern of gun violence that has touched blocks across the city this fall, including several high-profile incidents in North Philadelphia and Kensington in recent days. For residents of Brewerytown — a neighborhood that has seen new investment and young families move in alongside longtime homeowners — the burst of more than four dozen rounds on a weeknight is a stark reminder of how quickly gunfire can shatter a quiet street.

Anyone with information about the shooting is urged to contact the Philadelphia Police Department's tip line or submit an anonymous tip through the department's online portal. Police have not said whether the wounded woman was the intended target.

The investigation is ongoing.