West High School and South High School became the latest local high schools to receive a threat on Friday.
Viewers contacted the 23ABC newsroom saying they received a robo call, notifying them of the threat.
This is the sixth high school in a month, a written threat was found on school walls.
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Lisa Krch, an official with the Kern High School District said the threats at both schools were deemed non-credible.
Krch added that West High parents were notified of the threat through an all-call system.
West High has additional security on site.
District says the safety of their students and staff is their top priority.