Thick smoke billows into the sky from the roof of a building in Philadelphia on Tuesday as firefighters work to put out a fire. The fire appeared to have started at a building on the 3700 block of Frankford Avenue in the city’s Frankford neighborhood. Léelo en español aquí. At this ti me, it is unclear what started the fire or if anyone has been injured. This is a developing story; check back for updates. ...read more read less