One firefighter has died after being trapped in a building that caught fire in Philadelphia and then collapsed early Saturday, fire officials said. The fallen firefighter was not immediately identified, but Deputy Fire Commissioner Craig Murphy said he was a 27-year department veteran. “It’s going to be a rough few weeks coming up,” Murphy said at a media briefing around 8 a.m. The blaze broke out around 2 a.m. at a three-story restaurant and residential building located on the 300 block of West Indiana Avenue in the city’s Fairhill section. The fire had been put out, but then the building collapsed at 3:24 a.m.