At least 33 people lost their lives in the inferno which destroyed a California artist space.
Oakland Mayor Libby Schaaf confirmed at a press briefing that the death toll had risen to 33, RT reported.
She said that a criminal investigation team has been deployed and inspectors are at the scene, added that the humane removal of victims is the city’s first priority.
The Alameda County Sheriff’s Department said it was unclear how many people are left inside. The victims range from teenagers to people in their 30s, and reportedly include foreign nationals.
Earlier, Alameda County Sheriff Sargent Ray Kelly told reporters on Sunday that the death toll from the venue, dubbed the Oakland Ghost Ship, had spiked from 24 to 30.
Investigators at the site are still trying to determine the cause of the deadly fire. Earlier, Kelly said arson was not suspected and that the warehouse isn’t currently being viewed as a crime scene.
The fire raged for several hours, requiring over 50 firefighters to douse.
There have been reports that the building had no sprinkler system, and it appears that no smoke detectors went off during the blaze.