Pittsburgh EMS, Fire and Police responded to the 5800 block of Black Street for a reported unconscious female around 10:50 a.m.
When first responders arrived, a family member directed them to the woman in the bathroom.
Medics pronounced the woman deceased on scene.
The Mobile Crime Unit and detectives arrived to process the scene.
The investigation is ongoing.
Tonight, the City-County Building is illuminated to recognize Poison Prevention Week and the 50th Anniversary of "Mr. Yuk" in partnership with Children's Hospital of Pittsburgh of UPMC.
For questions about the lighting at the City-County Building, please reach out to the Office of the Mayor.