Sonora Police Chief Mark Stinson says the two 8-year-olds and a 9-year-old were discovered by another student last week at Sonora Elementary School. Superintendent Leigh Shampain told KPIX-TV the students were smoking in a school bathroom.
The student who found the smokers told school officials, who contacted police. The third-graders were released to their parents.
Stinson said on Wednesday police were looking into whether someone supplied the drug to the kids.
KPIX-TV said Shampain would not discuss how the third-graders might be disciplined.
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