HAVERSTRAW − First responders converged on the Bowline Plant Thursday after an electrical fire broke out in the power generator along the Hudson River.

Several fire departments and other emergency personnel responded to reports of an explosion at the facility at 10:24 a.m., the Thiells Fire Department said.

"It was determined that there was an electrical fire in multiple breakers of unit 1 that power the plant, powered by an estimated 13,000 volts," the department said. "The fire did spread to the exposures."

After electricity was shut off at the site, firefighters used dry chemical extinguishers on the breakers and exposures. The fire was under control around 1 p.m.

Town of Haverstraw police said no one was injured in the fire, which occurred in a control panel and forced the plant to shut down.

GenOn, the plant's owner, could not immediately be reached for comment.

The state Department of Environmental Conservation said its Spill Response and Environmental Conservation Police Officers responded to reports of an explosion and fire at Bowline. There was no reported impact on the river, the DEC said.

Firefighters from Haverstraw, West Haverstraw, Stony Point, Suffern, Spring Valley, Nyack and Mahwah also responded. Monsey firefighters covered the Thiells Fire District during the incident.

Other agencies involved included the Rockland fire coordinator's office, Rockland hazmat team, Rockland technical rescue team, state Office of Fire Prevention and Control, and EMS from Haverstraw, Stony Point, Spring Hill and Rockland, the Thiells Fire Department said.

Bowline: DEC says power generator violated pollution laws

Hudson: What's brewing along the river? Bubbling stumps environmentalists

The plant recently got into trouble over what the DEC said was a violation of state air pollution control laws.

On July 13 a column of black smoke was seen rising above the plant, which is close to the Hudson River. The DEC said that "opacity exceedance" was caused by operator error that could have been avoided. While adjusting natural gas flow to generating station unit 1, the plant operator inadvertently reduced flow on one pipeline while not simultaneously increasing flow on the other line, according to the DEC.

That disruption caused boiler flame issues, leading to the opacity increasing. A blocking valve was left shut, preventing gas flow. The DEC said the unit was back in compliance after five minutes.

Violators of the affected rule are subject to a civil penalty of up to $18,000, plus an additional penalty not to exceed $15,000 for each additional day, if any, that a violation continues, according to the DEC, which said it was considering its options for enforcement actions, including assessment of penalties, fines and injunctive relief.

The black smoke occurred the same day that bubbly water was seen in the Hudson River along Bowline Point Park, puzzling environmentalists.