While all events were resolved without injuries, the concentrated timing of the incidents raised questions among parents about whether the threats were connected. Designed by Freepik, www.freepik.com

YUBA CITY/ MARYSVILLE, CA (MPG) - Several Yuba–Sutter campuses experienced unrelated safety incidents this week, prompting lockdowns, police searches and heightened concern among families. While all events were resolved without injuries, the concentrated timing of the incidents raised questions among parents about whether the threats were connected.

Yuba City High School – Threatening Note Found

On Wednesday (Nov. 12) around 11:50 a.m., a student at Yuba City High School discovered a note containing threatening language. School administrators immediately contacted law enforcement and initiated safety protocols while the threat was assessed. No active danger was found, and the investigation remains ongoing.

River Valley High School – Gun Threat Call Leads to Lockdown

The following morning, at approximately 9:40 a.m. Thursday (Nov.13), River Valley High School entered lockdown after Yuba City Police received a report of a possible student with a gun on campus. Officers conducted a full sweep of the school and determined that no credible threat existed. Students and staff were safe throughout the incident.

Yuba College – Separate Lockdown at Marysville Campus

During the same day as the River Valley incident, Yuba College’s Marysville campus went into lockdown at around 2 p.m. while officers checked the grounds in response to a separate safety concern. The college issued an “all clear” shortly afterward, reporting that no threat was located.

District Said High School Incidents Were Not Related

In response to an inquiry about whether the local incidents may have been connected, Yuba City Unified School District Superintendent Dr. Doreen Osumi said the two high school threats were “two separate incidents and are not linked.”

Osumi said the district was in immediate communication with law enforcement and its school resource officers during both events. She also confirmed that the River Valley lockdown may have been the result of a false report.

“Per law enforcement, the incident at River Valley High School is being investigated as a potential hoax and determined to no longer be a credible threat,” Osumi said.

Osumi added that the district is not aware of any continued risk.

“There are no ongoing safety concerns that families should be aware of,” Osumi said.

Osumi emphasized that Yuba City Unified School District takes all threats seriously.

“Student and staff safety is the district’s highest priority and therefore, all threats are taken seriously and investigated,” Osumi said. “Our law enforcement, staff and students are to be commended on how they responded to this potential threat.”

Osumi encouraged students, parents and staff to continue reporting concerns promptly. Officials from Yuba City Police, Yuba College, and the Yuba County Sheriff’s Office did not respond to requests for comment by press time regarding whether the college’s lockdown or other regional safety calls appeared related.