Sheriff's investigators in southwestern Ohio say a 17-year-old high school student is at the center of a high-grade marijuana distribution ring that was raking in as much as $20,000 a month.

The Warren County Drug Task Force said Monday that the yearlong investigation culminated in seven people being indicted by a grand jury. Investigators say the Mason High School student who is believed to have started the operation had $6,000 in cash in his bedroom when officers arrived with a search warrant.

Warrants also were served Friday in the Cincinnati-area communities of Blue Ash, Norwood and Hamilton. Investigators say they seized more than 600 hydroponically grown marijuana plants with a street value of around $3 million.

Sheriff's officials have not released the names of those charged.

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