Pittsburgh Police received a 9-1-1 call for an exploded porta john on the 900 block of Itin Street around 7 a.m.
Police, Fire, and EMS arrived on scene, and were alerted to the destroyed unit by a construction crew. Pittsburgh Bureau of Police K-9 conducted a secondary search of the area.
The Bomb Squad and Crime Unit processed the scene where it was determined an explosive device was used sometime overnight.
There were no injuries and 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.