Based on a preliminary investigation, authorities said they think the victim was the owner of the spa and may have been targeted.
Irene White, a family friend, read a statement Wednesday on behalf of Krajnyak's family.
Barnes said investigators don't know the motive at this point.
The explosion rocked a medical building in Aliso Viejo, California, on Tuesday.
Krajnyak lived in the Orange County community of Coto de Caza.
The home of a homicide victim Ildiko Krajnyak is seen after it was searched by police overnight in Trabuco Canyon Calif. Wednesday
Her adult son is at Washington State University.
A neighbor there who would only give her first name as Tiffany said Krajnyak lived there with her estranged husband and mother, whom she cared for. The neighbor said Krajnyak was her mother's caretaker and describes the husband as a massage therapist and nice man.
Associated Press writer Amanda Lee Myers.
Formal identification of the body was continuing but authorities believe it was Ildiko Krajnyak (IL-di-koh KRY-nyak), a licensed cosmetologist, who owned the spa. In addition, investigators said they recovered materials at the scene that led them to believe it was not an accident. "At this time we ruled out the potential of this being an accident due to the condition of the victim".
The two customers injured underwent surgery Wednesday and were expected to survive.
A woman was killed and three other people were injured in the blast.
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Attorney Andrew Bisom, who represented Krajnyak and Ronilo Vestil during the Chapter 13 bankruptcy proceedings, said they were far along on their mandated payment plan but hadn't completed it.
Officials said there have been no arrests in the case.
"There were police and fire officials from Orange County; the FBI; ATF and Homeland Security", Karson says.
The deceased woman is said to be the target of the explosion.
Bomb technicians and investigators from the Orange County Sheriff's Department, the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives remained at the scene Wednesday, said Orange County Sheriff's Department spokeswoman Carrie Braun.
It was unclear what exactly caused the explosion, but investigators think it may have been caused by a package, the Los Angeles Times reported, citing two law enforcement sources. He said there is no indication there is a second device.
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Barnes said authorities found the victim dead at the scene, as well as two injured individuals who are now at the hospital and are expected to survive.
The Tuesday afternoon blast occurred in Aliso Viejo, which is about 50 miles south of Los Angeles.
The explosion blew siding off the walls, exposing insulation and framing and shattering windows at the two-story building.
Authorities say the dead woman had been inside the building.
"When I was playing outside I heard the big crash, I thought it was a garbage truck but it was a building that smashed", 6-year-old Kingston Dik told KNBC-TV.
Fire officials said a third person suffered smoke inhalation.
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