LOS ANGELES — Campuses in the Los Angeles Unified School District open for the first day of the new school year Aug. 14 and the district will implement measures to ensure the “safe passage” of children and parents to and from school amid heightened concerns of federal immigration raids.

Hundreds of district employees, volunteers and school police, and officers from several municipalities will patrol near an estimated 100 campuses and set up so-called “safe zones” in neighborhoods that have a high population of Latinos. The patrol groups will also focus on places where older Latino students are walking to campus.

Local officials said the patrols will serve as means of enhancing communication so schools can be locked down if necessary, and parents and others in the community can be alerted

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