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San Mateo, CA Police Department
Wednesday October 4th, 2017 :: 01:58 p.m. PDT


****UPDATE**** The SM High School campus is cleared and deemed safe. School instruction has resumed as normal


San Mateo Police Officers with the assistance of San Mateo County Sheriff’s Office K9 Unit conducted a precautionary search of San Mateo High School after school staff members were notified of a note written on a bathroom wall that contained a threat. The school was cleared and deemed safe. 
On Wednesday, October 4, 2017, at about 11:15 AM, San Mateo Police officers responded to San Mateo High School after staff found a random anonymous note in a bathroom. As a precautionary measure, San Mateo High School followed the “Secure Campus” procedure with all the staff and students continuing instruction, with doors locked. SMPD, with the assistance of the San Mateo County Sheriff’s Office, carefully searched the school and determined the threat not to be credible.
Although this was deemed an unsubstantiated threat, our children’s safety is of the utmost importance and SMPD with SMUHSD takes every step to ensure the safety of our students.
We would like to remind our parents to stay informed of the San Mateo County Big Five Safety Protocols, which can be found on the following link:
Sgt. Amanda Von Glahn
Sheri Costa
Communications Manager
San Mateo Union High School District
SMPD Dispatch Non-Emergency Number 650-522-7700
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The San Mateo Police Department with the assistance of San Mateo County Sheriff's Office are currently invesitgating a possible threat, which was written on a bathroom wall, at the San Mateo High School. The campus has be placed on a "secured campus" to err on the side of caution. Please avoid this area until further notice and monitor our social media platforms and Nixle for updates. Below is the criterior for the Big 5 School  Emergency Guidelines:


Initiate for a potential threat of danger in the surrounding community. All classroom/office doors are closed and locked and all students and staff remain inside until otherwise directed. Instruction continues as planned

SHELTER IN PLACE Implement to isolate students and staff from the outdoor environment and provide greater protection from external airborne contaminants or wildlife. Close windows and air vents and shut down air conditioning/heating units DROP, COVER & HOLD ON Implement during an earthquake or explosion to protect building occupants from flying and falling debris.

LOCKDOWN / BARRICADE Initiate for an immediate threat of danger to occupants of a campus or school building and when any movement will put students and staff in jeopardy. Once implemented, no one is allowed to enter or exit rooms for any reason unless directed by law enforcement

EVACUATION Implement when conditions outside the building or off-site are safer than inside or on-site. Requires moving or directing students and staff to move from school buildings to a pre-determined safe location.


San Mateo, CA Police Department
200 Franklin Pkwy
San Mateo, CA 94403

Emergency: 9-1-1
Non-emergencies: 650-522-7700

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