Del Oro High School in Loomis was placed on lockdown Friday after the Placer County Sheriff's Office reported a threat to the campus. Deputies were on site to secure students and staff while investigators worked to figure out what was behind the warning.
Del Oro High School is currently lockdown due to a threat. Deputies are on the campus currently working to ensure the safety of all staff and students. We ask everyone to please avoid the area. We will provide additional https://t.co/Wtc2n0Ag5p
— Placer Sheriff (@PlacerSheriff) April 10, 2026
What officials said
In a post on X, the Placer County Sheriff's Office said the campus "is on lockdown due to a threat" and that deputies were on campus "working to ensure the safety of all staff and students." The post urged people to steer clear of the area while officers investigated.
What we know
Deputies remained on campus as the situation unfolded, but the sheriff's post did not share any details about the nature of the threat or mention any injuries or arrests. Del Oro's website lists ParentSquare and the school's social channels as its official communication methods, and the district had not issued a separate emergency notice on the school's homepage at the time of the sheriff's message, according to the site.
Regional context
Across Northern California, schools have increasingly treated social media and other online threats as reasons to call lockdowns or shelter-in-place orders as a precautionary move. As reported by KCRA, similar online posts in the region have prompted quick responses from law enforcement and, in some cases, arrests.
Parents and community
Officials generally ask families to avoid the school and wait for verified updates from law enforcement or the Placer Union High School District during these incidents. Del Oro's site directs families to ParentSquare and the school's social media accounts for official messages. This story will be updated as the sheriff's office and district release more information.
