A nuclear power reactor 40 miles (65 km) north of New York City was shut down Saturday after a transformer fire, but officials said the Indian Point plant was stable and there is no threat to residents nearby.

People in the area reported an explosion and smoke coming from the plant at Buchanan in New York state. But the U.S. Nuclear Regulatory Commission said the fire was quickly extinguished.

"These events happen occasionally. They are not unheard of and the plant responded as designed," NRC spokesman Eliot Brenner said in a statement. He added the fire occurred at 5:50 p.m. and was put out 25 minutes later.