OAKLAND (CBS SF) — As the names of victims of a deadly fire that tore through an Oakland warehouse known as the Ghost Ship, details about those victims are beginning to emerge.

The seven victims identified are Cash Askew, 22, David Clines, 35, Travis Hough, 35, and Donna Kellogg, 32, all of Oakland, and Nick Gomez-Hall, 25, of Coronado in San Diego County, Sara Hoda, 30, of Walnut Creek and Brandon Wittenauer, 32 of Hayward.

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Continuing Coverage: Deadly Oakland Warehouse Fire

One person identified and whose family has been notified is a 17-year-old whose name will not be released.

The death toll in the fire at the Ghost Ship, which was a converted warehouse, rose today to 33, according to Alameda County sheriff’s Sgt. Ray Kelly.

Ghost Ship fire victim Nick Gomez-Hall. (CBS via Facebook)

Ghost Ship fire victim Nick Gomez-Hall. (CBS via Facebook)

Ghost Ship fire victim David Cline. (CBS via Facebook)

Ghost Ship fire victim David Cline. (CBS via Facebook)

Ghost Ship fire victim Cash Askew. (CBS via Facebook)

Ghost Ship fire victim Cash Askew. (CBS via Facebook)

35-year-old Travis Hough was a member of an electronic band.

Ghost Ship fire victim Travis Hough. (CBS via Facebook)

Ghost Ship fire victim Travis Hough. (CBS via Facebook)

32-year-old Donna Kellogg was studying at a culinary school and worked at a local coffee shop.

Ghost Ship fire victim Donna Kellogg. (CBS via Facebook)

Ghost Ship fire victim Donna Kellogg. (CBS via Facebook)

32-year-old Brandon chase Wittenauer, also known as Nex Iuguolo, was reported missing by friends after they saw an image of his car near the warehouse in news reports.

Ghost Ship fire victim Brandon Chase-Wittenauer. (CBS via Facebook)

Ghost Ship fire victim Brandon Chase-Wittenauer. (CBS via Facebook)

As of 3:15 p.m., crews had searched around 40 percent of the building at 1305 31st Ave., Kelly said during a news conference.

Oakland Mayor Libby Schaaf said the Alameda County District Attorney’s Office has begun a criminal investigation into the tragic fire.

“We’re doing everything we can to preserve evidence,” Schaaf said.

“We want to get to the bottom of how this happened.”

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Some of the victims included non-U.S. citizens, according to Kelly.

Kelly also confirmed that one of the victims was a son of an Alameda County sheriff’s deputy.

“We’re still dealing with that as we deal with the other victims, and our department is hurting from that,” Kelly said.

Sheriff’s officials are asking anyone hoping to identify a victim to save the victim’s DNA from items like a used hairbrush or toothbrush. The items should be secured in a paper bag to preserve their DNA, according to Kelly.

The Family Assistance Center set up at 2425 East 12th St. remains open and is offering resources and counseling to the family and friends of the victims.

The fire broke out just after 11:30 p.m. at the Ghost Ship that was being used by an artist collective. On Friday night, people were holding a party advertised on Facebook as the “Golden Donna 100% Silk 2016 West Coast Tour.”

Golden Donna, an alias of musician Joel Shanahan, issued a statement on Facebook Saturday about the fire.

Joel is safe but like many people he is heartbroken and has several friends among the missing,” the statement said. “Sending love to everyone affected by this horrific event.”

The Los Angeles-based music label 100% Silk also issued a statement about Friday night’s fire.

“What happened in Oakland is an unbelievable tragedy, a nightmare scenario,” the statement said. “We are a very tight community of artists and we are all praying, sending love and condolences to everyone involved and their families.”

The warehouse had apparently been the subject of some recent complaints. The building was last permitted for use as a warehouse, according to Oakland City Administrator Sabrina Landreth.

A notice of violation was given on Nov. 13 regarding “a ton of garbage piling up on the property” with “the main building remodel (sic) for residential,” according to city records.

A city inspector who visited the building on Nov. 17 verified the complaint, but could not get inside to confirm the interior construction, according to Landreth’s office.

Oakland director of planning and building Darin Ranelletti said Saturday the building was not legally permitted for any use other than as a warehouse, adding that Friday’s party was not permitted by the city, he said.

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“This is the most deadly fire in Oakland’s history,” fire Battalion Chief Melinda Drayton, a 19-year veteran with the department, said this morning. “It’s tragic to watch so many people perish in a fire.”