Carrie Braun, an Orange County Sheriff's Division spokeswoman, stated authorities had been working to find out if the explosion was an accident or an intentional act, the newspaper reported. All patients were evacuated and rescue service County orange.
Although the cause of the blast was still unknown, Bommarito told reporters around 3:30 p.m. that there was "no immediate hazard" to the community.
Officials are unclear what led to the explosion, but are not ruling anything out.
Federal, state and local authorities, including the FBI and the Department of Homeland Security, are investigating the blast, which occurred on the first floor of a building that was under renovation.
- AP is reporting that a US official says a deadly explosion at a Southern California office building is being investigated as an intentional act and investigators believe the blast may have come from a package. Tony Bommarito, a spokesman for the Orange County Fire Authority. "We're going to take each precaution doable earlier than we go in".
At an evening news conference, officials said the person who died in the explosion was a woman, but offered no other details about her. They had not released her name as of late Tuesday night.
Whom is not disclosed until the investigation is underway. Authorities say one person is dead and several others have injuries.
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Early reports indicated that a vehicle may have crashed into the building, causing the explosion, but authorities soon ruled that out.
The powerful blast blew out almost the entire bottom floor, officials said.
Mary McWilliams informed The Register that she arrived for an appointment to seek out smoke surrounding the realm and automobile alarms going off.
One girl, who had pores and skin peeling on her arm from burns, stated, "Care for my mom", McWilliams stated.
". They weren't on fire, they were helping each other across the street, walking very slowly and a lot of shock, shaking, just full of ash all over their face, eyes bloodshot, just blood all over", the woman said.
"When I was playing outside I heard the big crash, I thought it was a garbage truck but it was a building that smashed", his son, 6-year-old Kingston, said, according to the station. There were early reports that a vehicle had crashed into the building, but that turned out not to be the case. Drivers also were told to avoid the area because of multiple street closures.