Authorities are reviewing a manifesto and digital activity tied to the attack.
The main takeaway: FBI is reviewing digital activity. MundoNow groups this coverage with related people, places, organizations, and topics so readers can follow the story beyond one article.
What to watch next: Investigators cite radicalization. This page can expand with verified updates, source context, video, and short answers as the story develops.
Why it matters: California remains the focus. The coverage is organized so readers can move from a quick summary into deeper reporting without losing context.
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