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Threat at Rialto High School triggers lockdown; all-clear given, 1 student detained

Police detained a student of interest after clearing Rialto High School of weapons and explosives; two minor injuries occurred during evacuation, officials reported.

Summary by Abc 7 LA
Rialto High School was placed under lockdown on Monday afternoon as the San Bernardino and Rialto police departments responded to an alleged threat.

2 Articles

abc 7 LAabc 7 LA
Center

Threat at Rialto High School triggers lockdown; all-clear given, 1 student detained

Rialto High School was placed under lockdown on Monday afternoon as the San Bernardino and Rialto police departments responded to an alleged threat.

·Los Angeles, United States
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Fox 11 LAFox 11 LA
Center

Rialto High School students evacuate after report of threat; 1 in custody

One person is in custody after a reported threat at Rialto High School forced a massive crowd of students to evacuate from class.

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Fox 11 LA broke the news in on Monday, September 29, 2025.
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