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BIG BEAR LAKE, Calif. (AP) -- Students at a California highschool are being asked to turn in yearbooks after a pornographicphoto was discovered inside the memory book.

San Bernardino County investigators were notified Tuesday andBig Bear High School employees and detectives began collecting theyearbooks in the mountain community at Big Bear Lake, 70 miles eastof Los Angeles.

The school dance photo shows a 17-year-old boy's hand inside theclothing of a 15-year-old girl and may involve sexual penetration.

Sheriff's spokeswoman Cynthia Bachman says the couple is in thebackground and went unnoticed by the yearbook adviser.

Bachman says most students have returned yearbooks for editing.Detectives are contacting students who haven't turned in yearbookswith a warning they could face a charge of possessing child porn.

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