Investigators work at the scene of an explosion at an Aliso Viejo business that killed one person and injured two others. (Irfan Khan / Los Angeles Times)
Orange County Undersheriff Don Barnes, center, and Paul Delacourt, left, assistant director of the local FBI field office, head for a news conference Wednesday to discuss Tuesday’s fatal explosion in Aliso Viejo. (Irfan Khan / Los Angeles Times)
Shredded pink insulation hangs from the exterior wall of an Aliso Viejo commercial building after it was struck by an explosion on Tuesday. (Irfan Khan / Los Angeles Times)
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Law enforcement officials search a Long Beach property in connection with the Aliso Viejo explosion. (Kent Nishimura / Los Angeles Times)
Law enforcement officials search a Long Beach property in connection with the Aliso Viejo explosion. (Kent Nishimura / Los Angeles Times)