A single ominous voicemail was all it took to upend the school day in Larkspur this morning, as administrators shut down three Tamalpais Union High School District campuses and sent students home while police swept the grounds.
Classes were canceled and campuses evacuated at Redwood, San Andreas, and Tamiscal high schools after staff at one site reported a message that suggested a possible threat. Students were dismissed, and the schools were locked down out of what officials described as an abundance of caution.
What Officials Are Saying
According to KTVU, school websites and a Nixle alert said Redwood staff contacted the Central Marin Police Authority as soon as they received the voicemail. District notices explained that administrators opted to cancel classes while law enforcement secured the campuses.
Police Sweeps and Evacuation
Central Marin officers responded to the scene and carried out sweeps of the campuses while staff and students were evacuated, Patch reported. According to that account, police told families, “All students are being sent home at this time. Please do not come to the school and avoid the area for the time being.”
District Scrubs Events for the Day
Redwood’s online notice and reporting by KTVU said the school postponed all athletics along with an open house that had been scheduled for today. The district urged families to keep an eye on official communication channels for updates while investigators worked to pin down the origin and credibility of the threat.
Context and Guidance for Families
The Tamalpais district has been through this drill before. NBC Bay Area reported a similar mass closure and police sweep in September 2024 after another reported threat.
Parents are again being asked to follow district messages closely and to sign up for county emergency notifications. Marin County’s AlertMarin page lays out how to receive official alerts. Authorities said investigations were ongoing and that no arrests had been reported as of early Thursday morning.
