Monte Vista High School in Danville was briefly placed on lockdown Monday due to an "unspecified written threat," according to a town spokesman.
The nature of the threat was not released but it was based on something written on a campus wall, said Danville spokesman Geoff Gillette.
Gillette said he didn't know how long the school was on lock down for but the order was lifted at about 12:30 p.m. after police searched the school and deemed it safe.
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