WATCH: Thousands Evacuated Over Fuel Fumes from Derailed Train in Tennessee

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KNOXVILLE (CNN) — A derailed train car burst into flames early Thursday, releasing toxic fumes and forcing the evacuation of 5,000 people in Tennessee, authorities said.

Seven deputies were treated at a hospital after exposure to the fumes in Blount County, said Marian O’Briant, a spokeswoman for the sheriff’s office.

Maryville City Manager Greg McClain said that aside from the deputies, no civilian injuries were reported.

Josh West, a spokesman for Blount Memorial Hospital, said 12 emergency responders were decontaminated there, a standard procedure after exposure to toxic chemicals.

The car, which was part of a nearly 60-car train, was carrying acrylonitrile, a chemical compound used to manufacture plastics, said Kristin Seay, a spokeswoman for CSX, which operates the train.

The train was headed from Cincinnati to Waycross, Georgia, when the one car veered off the rails in Blount County, which is just south of Knoxville.

At a press conference in Maryville, Craig Camuso, CSX Regional Vice President of State Government Affairs, said that 27 of the train cars were carrying hazardous chemicals, including the one affected by the derailment.

“We will be working with local officials,” he said, “We’re in the process of monitoring the water and air.”

Blount County Mayor Ed Mitchell advised residents to avoid drinking well water and said that CSX would provide water bottles at a nearby school.

The-CNN-Wire ™ & © 2015 Cable News Network, Inc., a Time Warner Company. All rights reserved. (Photo: YouTube)

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