Danville School Placed On Lockdown Because Of Threat

DANVILLE (CBS SF) -- A lockdown of San Ramon Valley High School in Danville has been lifted following an unspecified security threat.

The school was locked down just before noon Tuesday for about 30 minutes.

The City of Danville said the school was placed on lockdown because of an unidentified "safety threat."

Danville police were on the scene. No further details were immediately available.