A loud bang alarmed people Saturday in Charlottesville, Va.,on a day when blasts erupted in New Jersey and in New York, but the Charlottesville noise was a transformer failure not explosives, authorities said.

An underground transformer failed at Charlottesville’s Downtown Mall, east of the University of Virginia campus, said a spokesman for Dominion Virginia Power.

He said no injuries were reported, and no obvious damage.

“This was a transformer failure,” and power company spokesman Rob Richardson. It was a failure “with a loud noise associated with it “ but “no explosion.”

The transformer failed, but “did not explode,” said Charlottesville police Sgt. J.R. Via. However, he said, “ it made a loud noise.” But the noise occurred in a busy area, and prompted calls to emergency communication centers, he said.