Investigation continues into deadly blast at Aliso Viejo building

As the investigation continued into an explosion that killed a woman in Aliso Viejo, FBI agents conducted an hourslong search Wednesday of a Trabuco Canyon home apparently owned by a woman who worked at the building rocked by the explosion.

Agents moved in on the home on Drover Court overnight and appeared to serve a search warrant at the residence, which is listed in the name of Ildiko Krajnyak, a beautician who works at a salon in the building at 11 Mareblu in Aliso Viejo, where Tuesday afternoon's blast occurred.

FBI officials could be seen on video from the seen carrying boxes out of the home.

Krajnyak's son told news outlets the family has not heard from her since the explosion.

Federal authorities are assisting the Orange County Sheriff's Department in the investigation of the roughly 1:10 p.m. Tuesday explosion at the building that also left three other people injured.

But authorities so far have been tight-lipped about reports by several media outlets claiming the explosion was intentional and may have come from a device that was delivered to the building.

Late Tuesday afternoon, local news outlets -- citing unnamed federal sources -- said investigators had determined that the blast was an "intentional detonation,'' and the explosive device was delivered to the building, addressed to a specific person.

Tuesday night, the Los Angeles Times cited two law enforcement sources who said "the explosion was likely caused by a package that was delivered to the location, but cautioned that it would be speculative to say the blast was intentional.''

Orange County Sheriff's Cmdr. Dave Sawyer told reporters Tuesday that investigators "don't know if it was an intentional detonation of a device.'' He said investigators had not found an explosive device at the scene on a lower floor of the building.

Authorities initially responded to the building on a report that a car had crashed into the building, but Orange County Fire Authority Capt. Tony Bommarito and sheriff's officials said later that was not the case. Bommarito said the blast occurred inside the building, and the woman who died was in close proximity to the explosion.

Authorities did not actually enter the building until late Tuesday, trying to ensure there was no danger of additional explosions. Outside the building, a massive contingent of sheriff's deputies and fire crews amassed, joined by federal agencies summoned to assist with the probe.

Sheriff's deputies snapped photos of vehicles that were leaving the scene throughout the afternoon.

Bommarito said one of the injured people suffered from smoke inhalation, but the extent of the other victims' injuries was unknown.

Children and staff at nearby Academy on the Hills preschool initially sheltered in place while the investigation continued, but children were later evacuated to a Target store parking lot so they could be reunited with their parents. No children were injured, officials said.

Video from the scene showed teachers leading the children along a sidewalk toward the Target. Other people could be seen wheeling cribs down the street as the area was evacuated.

A woman who was on her way to an appointment in the area told news outlets she arrived just after the blast occurred, and she saw fire on the roof of the building.

"Then everyone started running out of buildings everywhere with looks on their faces of just horror,'' the woman said. "... I saw two women come out full of blood, hair singed, just glass stuck to the hair, glass stuck to their bodies. Their skin was burned and peeled back, and they were just in shock.

"... 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.

Sheriff's deputies were called to the same block of Mareblu at 11:35 p.m. Monday for a "patrol check,'' according to sheriff's records. It was not immediately clear what prompted that call.

A hotline has been set-up for people wanting more information. You can call: 714-628-7085.


Copyright 2018 FOX 11 Los Angeles: Download our mobile app for breaking news alerts or to watch FOX 11 News | Follow us on Facebook, Twitter, Instagram and YouTube.