Half Moon Bay shooting: Attack that killed 7 was workplace violence, officials say

correction

An earlier version of this article said the person who was being treated at Stanford Medical Center was out of surgery and had been released. San Mateo County Sheriff Christina Corpus said that the person was out of surgery, but not that the person had left the hospital. The article has been updated.

Details about what happened on Monday were slow to emerge, as authorities worked to reach the victims’ families and to further investigate ahead of a planned Wednesday arraignment for the suspect, 66-year-old Zhao Chunli of Half Moon Bay.

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