Federal authorities are searching homes in two Southern California neighborhoods Wednesday in connection with a fatal explosion at an Orange County medical building.
Investigators plan to provide an update Wednesday on their findings following the blast that killed one person and injured at least three others Tuesday in Aliso Viejo.
Watch Live: Investigators are planning a noon news conference
The explosion was an “intentional detonation,” and the explosive device was delivered to the building, addressed to a specific person, federal
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