Fatal California explosion likely caused by device, authorities say

National/World News

**Embargo: Los Angeles, Calif.**

A deadly explosion at a California medical facility — so powerful it blew out walls of the building and caused the ground to shake in nearby structures — shows no sign of a gas leak and police can’t say for certain whether it was intentional.

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A deadly explosion Tuesday at a California medical facility that killed the owner of a day spa was likely caused by a device and was not accidental, authorities said.

The explosion blew out walls and windows of the facility, heavily damaging the first floor corner of the two-story building in Aliso Viejo, about 50 miles southeast of Los Angeles, said said Capt. Tony Bommarito, a spokesman for the Orange County Fire Authority. Three people suffered injuries from the blast.

Evidence shows the materials that caused that explosion were not consistent with items used at a day spa, Orange County Undersheriff Don Barnes said. Authorities are treating the explosion as a crime, but are still working to confirm if the blast was intentional. No arrests have been made.

Earlier, a law enforcement source told CNN that the explosion may have been detonated on purpose, but the CNN’s law enforcement source also cautioned that the investigation was in its preliminary stages.

“At this point, we do not believe this was an accident. We’ve ruled out a gas main explosion and other potential theories,” said Paul Delacourt, FBI assistant director in charge of the FBI’s Los Angeles field office. “At this point, our working theory is that this explosion was caused by a device.”

Delacourt said it is “premature to speculate on the nature of the components of the device.”

Barnes said authorities believe the victim who was killed in the blast was Ildiko Krajnyak, 40, of Trabuco Canyon.

Two victims, believed to be patrons of the day spa, are undergoing surgery and are expected to survive. A third person suffered smoke inhalation and was treated and released at the scene.

Authorities served three search warrants Wednesday — one at the Aliso Viejo business, one in Long Beach and one in Trabuco Canyon, Barnes said.

Dong Shin, a witness, said he heard a loud boom minutes before his appointment in a nearby building.

“And the ground shook,” he said. “While the ground was shaking … my body jolted and my head hit the wall.”

Shin said it felt like “a big earthquake,” and as he and others rushed downstairs to get out of the nearby building, he saw two holes in the wall of the medical facility. He also saw “fire, smoke, insulation popping out of the walls, a lot of scared people running around, a lot of commotion,” he said.

One woman who ran out of the medical facility had her face covered in blood, Shin said.

The blast, which erupted around 1 p.m (4 p.m. ET), caused extensive damage to buildings in the area, Orange County Sheriff’s Deparment Commander Dave Sawyer said earlier.

“Anytime you see an explosion of this magnitude, it would definitely be suspicious to us, and that’s why we rolled out all the resources to get to the bottom of it,” Sawyer said earlier.

Nothing indicates there were any threats made before the blast, which appeared to be concentrated in a suite on the first floor of the building, Sawyer said.

There is no specific person that authorities are searching for right now, he said.

There was no initial indication of terrorism, FBI spokesman Mike Gifford said.

The sheriff’s department is partnering with the FBI, the Department of Homeland Security and the Bureau of Alcohol, Tobacco, Firearms and Explosives, who will assist investigators.

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