Philadelphia Fire Injures 7; Firefighter Critical Fire officials say a blaze in a north Philadelphia row home injured seven people, including three firefighters, one critically. Authorities say the fire in the three-story building was reported just before 6 a.m. Arriving crews have reported heavy black smoke pouring from the third floor. Firefighters battled the flames for about an hour. One firefighter has been taken to a hospital burn unit in critical but stable condition. Two other firefighters are reported to be in stable condition. Firefighters helped two people from the building while two others escaped on their own. All four had minor injuries that were treated at a hospital. Authorities are investigating the fire's cause.