The third video at the bottom has information about the ATF interviewing people about the fire. Apparently, the fire is under investigation and might have something to do with the demolition of the building next door.
MASSIVE FIRE IN OLD CITY — Firefighters are battling a blaze at a building in the Old City section of Philadelphia.
Firefighters are battling a blaze at the Suit Corner building in the Old City section of Philadelphia. The fire was reported around 9:15 a.m. at 3rd and Market. The fire went to two alarms before finally being brought under control at 10:37 a.m. Speaking on Action News, Fire Commissioner Lloyd Ayers said everyone in the building was able to evacuate safely. Officials say one firefighter has been injured in a fall. The firefighter suffered minor injuries.