CLAIRTON, Pa. (WHTM) – An explosion at a U.S. Steel coking plant near Pittsburgh on Monday left people trapped under the rubble, officials say.

There were no confirmed fatalities yet at the Clairton Coke Works, said Abigail Gardner, director of communications for Allegheny County.

The Allegheny County Emergency Services reported that a fire ignited at the plant around 10:51 a.m. They transported five individuals but did not disclose further details, only stating that the situation was ongoing.

Located along the Monongahela River just south of Pittsburgh, the Clairton Coke Works is a substantial industrial site known as the largest coking facility in North America.

Pennsylvania Governor Josh Shapiro mentioned that both the Pennsylvania State Police and Pennsylvania Emergency Management Agency are coordinating with first responders and have offered full support.

“Please join Lori and me in praying for the Clairton community,” the governor posted on social media.

U.S. Sen. John Fetterman said he was monitoring the explosion and waiting for more information.

“Keeping those injured and all who are impacted in my thoughts right now,” Fetterman said.

Lt. Gov. Austin Davis shared that he knows people who work at the plant and that he and his wife “are praying for the workers and their families.”

In June, a deal approved by President Donald Trump allowed Nippon Steel to acquire U.S. Steel, ensuring that U.S. Steel remains in the Mon Valley, including Clairton, with plans for around $11 billion in new investments by 2028.

The Associated Press contributed to this report.