Firefighters were hampered in their efforts to put out the blaze by clutter.
Commenters were not kind - many seeming particularly upset that the post was all about Ion, as opposed to the many victims of the fire.
"The whole place was built like you are going to set up for a fire", said Matt Hummel, 46, who has worked in construction and helped renovate other warehouse spaces for artists.
He later clarified that at least two dozen people remained unaccounted for Saturday night besides the nine victims whose remains were initially found and recovered from the rubble.
Crews in Oakland, California, are removing debris "bucket by bucket", Battalion Chief Melinda Dayton said.
They have gone through the building searching the debris, 'bucket by bucket, ' Ms Drayton said.
"We don't know if any of them went someplace else, self-transported to the hospital", Reed told CNN. Ray Kelly of the Alameda County Sheriff's Office said at an evening news conference.
"I texted one of my friends immediately and you know, people were checking in on Facebook, we were all checking in looking for them and they're still not accounted for and I can only think the worst at this point", she said.
"It's a awful thing to have to say that and to have to come out here and do that, but that is what we're left to deal with here", Kelly said.
She said she has heard reports that some people may have been living there, but that there were no bedrooms as such, adding it wasn't clear how many people lived there, if anyone.
Kanye West released from hospital, was 'fighting' with Kim before hospitalization
Kim's low key celebration was attended by included her sisters, Khloé and Kourtney Kardashian, and her half-sister Kylie Jenner. The rapper got discharged from the UCLA Medical Center hospital on Wednesday after a week-long treatment for exhaustion.
Firefighters arrived just before midnight Friday, and the fire was still smoldering more than 12 hours later.
Firefighters used chain saws and axes Saturday to cut through the debris of the cluttered building in a gritty neighborhood of the San Francisco Bay Area city, where the fire broke out about 11:30 p.m. Friday.
"She is one of the most magical people I've ever met", he said, describing the people who were there are artists and creatives.
She added, "I have lost 20 friends in the past 24 hours".
The office said coroners were also at the scene Saturday morning and unavailable for comment. "I just hope that ..." Kelly said several dozen people missing earlier in the day and feared to be in the building had been located by nightfall.
"In a couple of minutes there were flames coming out of the windows and black smoke was just billowing out of the house", she said. The building's roof had collapsed into the second floor, which in places fell to the bottom floor. It had a permit to function as a warehouse but not as a residence or for a party.
"It really does touch home because I was just recently looking into purchasing a warehouse space myself, and something that does come to mind always is codes and making sure that we're meeting those things and insurance is covered", said Aurora Jimenez, the founder of Retreat 916, which organizes such events created to bring attention to the artist community in Sacramento as well as bringing outside artist in. Mayor Libby Schaaf called it a "devastating scene". On Friday night, there was an event featuring musician Golden Donna's 100% Silk West Coast tour.
The blaze broke out Friday night in the two-story building, which housed artist studios and events and was hosting an electronic music show.
"A lot of these people are young people", Kelly said. As members of this community, the Oakland Raiders, Oakland Athletics and Golden State Warriors are doing what they can to lend their support. Some of the dead may be foreign nationals, he said. Old lamps, musical instruments, suitcases and rugs decorated the ornate space. Firefighters had to temporarily stop their search and rescue operations Saturday when they became too unsafe, taking time to shore up the structure, Oakland deputy fire chief Mark Hoffmann said.