GRACE, Idaho -- Federal, state and local law enforcement officers have raided a large and sophisticated marijuana growing operation on state land in the mountains of southwestern Idaho. No arrests were made.

Caribou County Sheriff Ric Anderson says there were well over 10,000 marijuana plants, possibly worth more than $20 million, in a series of grow operations. He says it is one of the largest marijuana busts in state history.

Sheriff's personnel from several counties along with state and federal drug agencies, the Idaho State Police and the Bureau of Land Management raided the grow site Tuesday.

The remote site is only accessible by foot or all-terrain vehicle. The Idaho State Journal reports Black Hawk helicopters were used to airlift the mostly 6- and 7-foot tall plants to an area closer to Grace, where they were being loaded into dump trucks.

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