(LOS ANGELES TIMES) Officials have closed all Los Angeles Unified School District campuses Tuesday morning after receiving a "credible threat" of violence involving backpacks and packages left at campuses.
Authorities said they plan a search operation of all of the LAUSD's more than 900 schools. The nation's second-largest school district has more than 700,000 students.
“I think it’s important to take this precaution based on what has happened recently and what has happened in the past,” LAUSD Superintendent Ramon Cortines said.
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