Marijuana found growing in Fentress County. (Photo Courtesy: Fentress Courier)

JAMESTOWN, Tenn. (WVLT) -- Fentress County Sheriff's Deputies have shut down a $5 Million manufacturing drug operation. Deputies say the operation was growing marijuana in Fentress County to be delivered to several states.

Chief Deputy David Oppenheim says his deputies have uncovered 3 pot houses across the county. He says it took months of investigating to build enough evidence to make an arrest.

"We had an idea that this was quite a major operation. These grow houses have been operating in the county for quite a number of years," said Oppenheim. "It was a rather large operation for us, I believe the largest in Fentress County history."

The three homes were in the Pine Haven, Clarkrange, and Banner Springs communities. Oppenheim says 4 people have been arrested. Deputies are not releasing the exact location of the homes or the people arrested.

Deputies say they believe there are more people involved in the opperation and that those people are probably from out of state.