Authorities responded to the school located at 4650 West Olympic Boulevard just after noon.
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Police received a report that multiple students had been shot, but they believed it may have been a swatting call.
Out of abundance of caution, multiple units responded to the school, authorities said.
According to a statement issued by school police, the campus was placed under a lockdown while school police and officers with the Los Angeles Police Department conducted a "systematic search of the campus."
School officials said there was no evidence of a shooting or person with a gun.
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All students and staff are safe and accounted for. The school has since resumed normal operations.
It's unclear if the call came from someone at the school.