Mt. Carmel High School Lockdown in San Diego: Active Police Investigation Underway

San Diego police are on scene at Mt. Carmel High School in Rancho Peñasquitos right now after a reported threat triggered a full campus lockdown, according to early reports from multiple local outlets. Significant police resources have been deployed to sweep the school grounds.
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NBC 7 San Diego reports the lockdown is active, with a heavy law enforcement presence conducting a sweep of the campus. FOX 5 San Diego and KUSI News also confirmed police activity at the school. The nature of the threat has not been publicly confirmed at this time.
If your kid goes to Mt. Carmel, hold tight. Details are still coming in and the situation is developing. Avoid the area around the school until authorities give the all-clear.
What We Know So Far

San Diego police are investigating a reported threat at the school. "Significant police resources" are on campus, per NBC 7. The lockdown is active as of the latest reports. No injuries, deaths, or suspects have been confirmed in any of the early coverage.
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What We Don't Know Yet

The exact nature of the threat has not been released. It's unclear whether students are sheltering in place inside classrooms or if any evacuation is underway. No suspect information has been confirmed by authorities at this point.
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This is a breaking, developing story. Details are changing fast and early information may be revised. Check back for updates as San Diego police release more information.