CALABASAS (AP/CBS) — The Los Angeles County Sheriff’s Department says its detectives have begun a hate crime investigation after swastikas and other anti-Semitic graffiti were found at a high school.

Lt. David Thompson of the Malibu/Lost Hills Sheriff’s Station said in a statement that maintenance workers on Saturday found the spray-painted words and symbols on doors, walls, sidewalks and a stop sign at Calabasas High School.

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Captain Mike Parker of the Sheriff’s Headquarters Bureau said “The graffiti included Nazi swastikas, words and symbols related to anti-Semitism, and teachers names.”

The workers called the sheriff’s station, and detectives there opened the investigation. There have been no arrests made or suspects named.

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Sheriff’s deputies believe the vandalism occurred between 4 p.m. Friday and 9 a.m. Saturday morning, Parker said, adding that the case is being treated as felony vandalism and hate crime.

Calabasas is a well-to-do city of about 20,000 people in the San Fernando Valley about 30 miles northwest of downtown Los Angeles.

Anyone with information on the vandalism is urged to contact Malibu/Lost Hills Station sheriff’s detectives at (818) 878-1808.

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