The school was locked down at about 11:55 a.m. after someone found graffiti in the main boys bathroom that read, "every body dies at 12:30."
[Ads /]
RELATED: Threats to Diablo View Middle School made via hacked social media account; juvenile arrested
Police responded and determined that there was no credible threat to the school, district spokesman Chris George said. The lockdown was lifted a little after 1 p.m.
While the lockdown has been lifted, students will be kept indoors for the rest of the day and police will remain on campus, George said.
[Ads /]
This is the second time in the past month a school in the district was locked down due to similarly threatening graffiti.
On Nov. 7, Iron Horse Middle School in San Ramon was placed on lockdown after a noon shooting threat was found scrawled on a bathroom wall.