Wichita ? Investigators on Wednesday destroyed a clandestine marijuana farm in a rural area north of here that apparently had been tended by people living in a makeshift camp.

Agents from the Kansas Bureau of Investigation joined officers from the Sedgwick County Sheriff’s Department cutting down the marijuana. Authorities said some stalks were described as 15 feet high.

The marijuana patch was the size of a football field with more than 3,000 plants, according to authorities, who estimated the plants’ value at $1,000 apiece, or roughly $3 million altogether.

Authorities used chain saws and other equipment to cut down stalks before spraying the roots with a herbicide.

KBI Special Agent Rod Page said officials believe at least four people were living at the site at one time to the marijuana around the clock.

“They brought in potting soil, plastic cups, everything,” Page said.