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LANCASTER, S.C. -- A Lancaster woman is behind bars after a medical call for help led to the discovery of a meth lab, police say.

Around noon on Wednesday, emergency first responders were dispatched to a home in the 1400 block of Crestfield Drive on the report of a potential overdose.

When authorities arrived on scene, an unconscious male was located in a bedroom of the home. Despite attempts to wake the man, he remained unresponsive. EMStransported him to Springs Hospital where he remains in serious condition.

Officers detected a strong odor in the home and came across what appeared to be a functional meth lab. The Lancaster Fire Department confirmed the working meth lab, and all of the occupants of the home were evacuated.

Inside the home at the time of the incident were the unresponsive man, who has not been identified, the homeowner, 77-year-old Kay Duncan, 30-year-old Christy Nicole Knight and Knight's 2-year-old son.

Knight and her son were both taken to Springs Hospital for decontamination.

Knight was subsequently charged with manufacturing methamphetamine and exposing a child to methamphetamine.

The child has been transferred into the custody of the Department of Social Services.

Additional charges are anticipated, authorities say.

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