Cops kill pot field near Woodstock

Authorities in McHenry County on Thursday eradicated a field of about 4,250 marijuana plants -- reportedly valued at more than $4 million -- after discovering a large-scale growing operation in a conservation area near Woodstock.

Officers from the McHenry County Sheriff's Office, Drug Enforcement Administration, McHenry County Conservation District and North Central Narcotics Task Force participated in the raid, which authorities said found thousands of plants 5- to 7-feet tall spread over about three acres near the 900 block of Cold Springs Road.

Sheriff's police said the remote field was located by air patrol.

No suspects were arrested, but police said the fields appeared to be recently tended to and the plants were being prepared for harvest.