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Update, Wednesday 5:30 a.m.:

A Knox County Sheriff's officer is out of the hospital this morning after being treated following a meth lab bust. According to the Knox County Sheriff's Office the officer was taken to U.T. Medical Center for heat problems he encountered with the air tight suits worn on the scene of the meth lab bust.

Four people have been charged with initiating and promotion of meth. Charges in this investigation are 51 year old Robin Sharp Welch, 41 year old Barbara Hickman, 47 year old Daniel Moore and 29 year old Joshua Phipps.

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A Knox County Sheriff's officer was transported to a hospital Tuesday night during an investigation into an active meth lab, a KCSO spokesperson said.

The preliminary investigation showed a meth cook was in progress when deputies arrived at the scene late Tuesday afternoon at 417 Cash Road near Asheville Highway in East Knox County, spokesperson Martha Dooley told WBIR 10News.

The officer who was transported was taken to UT Medical Center for a possible heat-related issue due to the air-tight suits worn for protection, the Sheriff's Office reported in an update on their web site.

Two men and two women who were at the home are in custody, officials said. They will be jailed once Rural Metro decontaminates them.

Investigators said officers could be on the scene until early Wednesday morning.

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