Story highlights A faulty transformer sparked a fire at the Indian Point nuclear power plant

The fire was on the non-nuclear side of the plant

No one was injured

New York (CNN) A transformer failure at the Indian Point nuclear power plant caused an explosion and fire at the facility Saturday evening, sending billows of black smoke into the air near Buchanan, New York.

The fire broke out on the non-nuclear side of the plant, about 200 yards away from the reactor building, according to Entergy spokesman Jerry Nappi.

"The fire is out and the plant is safe and stable," Nappi said. Federal officials said one reactor unit automatically shut down.

No one was injured in the blaze.

There was "no threat to public safety at any time," the facility said in a tweet. "All Indian Point emergency systems worked as designed."

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