UPDATE: Superintendent Says Saturday's Shooting Influenced Lock-Down

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COLUMBIA - Columbia Public School's Superintendent Chris Belcher told a KOMU reporter that a text message sent to students Monday morning led to the school being put on lock down. The text messages referenced the shooting death of 17-year-old Bryan Rankins who was a Rock Bridge student. Belcher said there wasn't a specific threat to any individual students, but the school decided to take precautionary measures by placing the school under lock down. All students are safe.

The lock down took place at 10:30 a.m. when a security officer called the Columbia Police Department after seeing a text message from a student's phone.

The lock down was lifted at 11:10 a.m. with all the students reported safe and uninjured.

The incident has been turned over to the police department for further investigation.