Aliso Viejo, California (CNN) A California day spa owner killed in a deadly blast this week opened a cardboard box that exploded -- and investigators found a nine-volt battery, a cellphone and loose wires among the debris, according to federal court documents filed Thursday. The blast injured three women, including two patrons of the day spa. "As soon as Krajnyak opened the box, Victim 2 stated that the box exploded and recalled being blown backwards by the explosion onto the floor," the affidavit said. Ildiko Krajnyak, the victim of an explosion at a California medical facility, is seen in a photo from her Facebook profile. The two opened the day spa shortly thereafter; the business recently moved to the Aliso Viejo building.

Source: CNN May 17, 2018 14:15 UTC