Grand Terrace, California — Grand Terrace High School was placed under a precautionary lockdown today following reports of a security threat, prompting a response from local law enforcement and school officials.
Deputies were dispatched to the campus to conduct a thorough sweep of the premises and assess the situation. Officials worked to ensure that students, faculty and other individuals on school grounds remained safe while the investigation was underway.
The San Bernardino County Sheriff’s Department led the law enforcement response and coordinated with school administrators. Standard lockdown procedures were activated after the initial alert, including securing entry points and restricting movement across the campus.
During the lockdown, students and staff were directed to remain in supervised classrooms and secure locations while deputies assessed the campus. The safety procedures were intended to prevent unauthorized access and allow law enforcement to complete its investigation.
The Colton Joint Unified School District also activated its emergency communication protocols and maintained coordination with authorities. Parents and guardians were advised to monitor official school communication channels for information about the campus and any dismissal arrangements.
As of the latest information provided, the campus has been secured by responding deputies. Authorities have not released further details about the origin of the reported threat, and the circumstances surrounding the alert remain under investigation.
Parents were advised to wait for official notifications rather than going directly to the campus during the lockdown, as additional traffic could interfere with law enforcement operations. Further updates are expected from the school district or authorities as more information becomes available.
