LOS ANGELES (KABC) -- Los Angeles Unified School District students and teachers returned to class for the new academic year Thursday with new measures in place after a summer filled with immigration raids, and amid worries that campuses could become a target in the Trump administration's aggressive crackdown.

LAUSD Superintendent Alberto Carvalho has urged immigration authorities not to conduct enforcement activity within a two-block radius around schools starting an hour before the school day begins and until one hour after it classes let out.

"Hungry children, children in fear, cannot learn well," Carvalho said in a news conference this week.

On Monday, a 15-year-old boy was detained by federal agents outside Arleta High School in an alleged case of mistaken identity. He was late

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