RIALTO, Calif. — Rialto High School was placed on lockdown earlier today after reports of a shot fired on campus triggered a swift and large-scale response from local law enforcement. The incident caused widespread alarm among students, staff, and families as authorities worked quickly to secure the school and determine what occurred.

According to the Rialto Police Department, officers rushed to the campus after receiving initial reports of gunfire. School administrators immediately activated emergency lockdown procedures, instructing students and staff to shelter in place while officers conducted a methodical sweep of the grounds.
Parents were urged to stay away from the school until officials confirmed the situation was contained, with updates shared through district and police communication channels to minimize confusion and ensure public safety.
As of now, authorities have not released details regarding possible injuries, suspects, or a motive behind the reported gunfire. Investigators remain on scene, gathering evidence and interviewing students, staff, and potential witnesses. Additional units, including K-9 teams and school resource officers, have been deployed to assist in securing the campus and supporting the investigation.
Rialto police emphasized that every precaution is being taken to ensure the school is safe before lockdown procedures are lifted. District officials echoed that sentiment, underscoring that the well-being of students and staff remains their top priority.
In the aftermath of the lockdown, counseling and mental health services have been made available for students, staff, and families affected by the incident. School officials acknowledge the emotional toll such events can have, particularly on young people, and have encouraged anyone who needs support to seek assistance.
Witnesses reported hearing a loud noise that sparked immediate concern, though authorities have not yet confirmed the nature of the sound or whether it was directly tied to a firearm. Law enforcement officials say determining the source of the reported gunshot is a key focus of their investigation.
Police have urged anyone with information or cellphone footage from the campus to come forward, noting that community cooperation is essential in piecing together the timeline of events.
The incident has renewed discussions about campus safety in California and across the country, with officials highlighting the importance of vigilance, preparedness, and clear communication during emergencies. As the investigation continues, authorities are reviewing response protocols to ensure that schools remain secure learning environments for all students.