A large explosion has rocked the Indian Point nuclear plant in upstate New York, the facility's management reported.
Indian Point Energy Center is a three-unit nuclear power plant station located in Buchanan, New York just south of Peekskill. The plant on the east bank of the Hudson river is located 61km north of New York City.
The company running the plant said the facility was safely shut down and in safe and stable condition after a transformer failure.
Residents in the vicinity of the plant reported the explosion and said they saw a 200m high fire ball over plant.
NBC's Chris Essner said on Twitter that the fire was extinguished. "No injuries and police say there is no ongoing emergency threat."
The transformer fire at the Indian Point nuclear power plant north of New York City is not a high-level risk and does not pose a threat to the people nearby, according to the U.S. regulator for nuclear power.
"There is no threat to area residents," said Eliot Brenner, director of public affairs for the U.S. Nuclear Regulatory Commission. "They declared an unusual event. That's the lowest of our four situation designations."
An "unusual event" classification indicates a potential security threat or a possible "degradation of the level of safety" at a plant, according to the NRC website. It also means there have been "no releases of radioactive material requiring offsite response or monitoring."