missing. imagine the anguishing wait for their families after a massive fire started during a party at an oakland warehouse. >> now we know at least 100 people were inside as this fire consumed the second story of that building. those people scrambling to get out before a make shift stairwell collapsed along with the roof of the building. >> i busted through my door and saw this black smoke. i couldn't breathe. i was with my phone and like the lights went out. dropped my phone and like -- i had to like scream and get to the front. >> this is a devastating scene. this is complicated and it is going to take us time to do the methodical, thorough, and professional investigation that these families deserve. >> officials fear dozens more people may have been killed here. firefighters cannot -- say that they cannot search that entire building until they make certain that it's safe. >> there was a facebook page that was actually originally being used to promote the party.