Pittsburgh Bureau of Police officers from Zone Two responded to reports of a stabbing in the Market Square area Downtown just before 11 p.m.
When they arrived on scene they found a male victim with lacerations to his arm and back near 2 South Market Square.
He was transported by EMS to a local hospital in stable condition.
One male suspect is in custody. Charges are pending.
Police believe the initial incident may have occurred in the 700 block of Liberty Avenue with the victim either fleeing or being chased into Market Square by the suspect.
The investigation continues.
UPDATE: Michael Bob Jr., 25, of Carnegie, PA was arrested in this incident. He is charged with Aggravated Assault and Terroristic Threats.
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.