Pittsburgh Police from Zone 2 responded to a domestic incident in the 700 block of Bryn Mawr Road at around 4:45 p.m.
When officers arrived on scene a female was outside of the apartment and told them a male was inside the building with a firearm.
SWAT was called out of an abundance of caution. The male was eventually found hiding inside an apartment that wasn't his. He was arrested without incident. He faces firearms and domestic-related charges.
Another male faces possible charges for obstruction by harboring the male in his residence.
The roadway was cleared around 6 p.m.
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.