Crews are on the scene battling a two-alarm house fire in West Mifflin on Saturday evening. The two-story house is located in the 500 block of McGowan Avenue in West Mifflin. Pittsburgh's Action News 4 was told no one was home at the time of the fire. It is unclear how the fire began. Stay with the WTAE mobile app for updates. Download the app now to stay connected with breaking news updates.