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.