Let's turn now to another breaking story our team's been following. At least one person's been killed in an explosion at a steel plant in Pennsylvania. And we've learned several others have also been injured.This happened at a US Steel facility just south of Pittsburgh. A county spokesperson tells NBC News an unknown number of people are still trapped somewhere inside that rubble. NBC's Maris Francis is following this one for us.Uh Maris, I know this is a fluid story, but what more do we know about this exp ...

People are reportedly trapped under rubble at a U.S. Steel plant outside of Pittsburgh after an explosion Monday that drew first responders to battle flames and heavy smoke at the facility, multiple news outlets reported. (Photo: Associated Press)https://t.co/Dsmnikvbdu https://t.co/ntSXEIUb11 ...

An explosion at a US Steel plant near Pittsburgh left one dead and dozens injured or trapped under the rubble Monday, with emergency workers on site trying to rescue victims, officials said https://t.co/Xgct8VTaUx ...

An explosion at a U.S. Steel facility in Pennsylvania killed at least one person and injured dozens more, authorities said Monday https://t.co/nhIjoE6Ijw ...

U.S. Steel Explosion: Rescue Operations Underway Outside Of Pittsburgh (Live Updates) https://t.co/Kh8mUbEPbM https://t.co/Kh8mUbEPbM ...

Right now, we are following breaking news out of Pennsylvania. That's where crews are on the scene after a reported explosion at the US Steel Claron Cokeworks, a steel fabricator plant. Our NBC affiliate in Pittsburgh is reporting that one person has died and the crews are searching for people that may be trapped inside that rubble.Officials have declared this a mass casualty incident, which allows for additional resources to be brought. ...

Safety Concerns - Steel manufacturing is a dangerous job, highlighted by a large fire incident a couple of years ago [1] - The fire serves as a reminder of the inherent risks associated with steel production and coke manufacturing [1] Operational Resilience - The company demonstrated resilience by rebuilding quickly after a previous incident 5 years ago [1]

Core Points - An explosion occurred at the U.S. Clairton Coke Works plant in Clairton, Pennsylvania, resulting in injuries and trapping individuals under rubble [1][2] - Rescue operations are ongoing, with at least one person unaccounted for and nine individuals hospitalized [2] - The explosion took place in the "reversing room" of the plant, which is crucial for the coking process in steel production [4] Company and Industry Impact - The Clairton Coke Works is the largest coking operation in North America, playing a significant role in the steel production supply chain [4] - The incident has raised concerns about air quality, prompting health officials to advise nearby residents to stay indoors [3] - The local community is deeply affected, with the mayor expressing the emotional toll on families connected to the mill [5]

U.S. Steel Explosion: Rescue Operations Underway Outside Of Pittsburghhttps://t.co/KQHy8GZ9qD https://t.co/t168fg5ZGX ...

We have some breaking news. A rescue mission now underway in Pennsylvania to try to free people trapped underneath the rubble after a steel plant explosion near Pittsburgh. You can see these pictures from the scene.We're getting our information from an Alageney County spokesperson who also tells NBC News that the health department is on site testing the air quality. Now, it's early on. We don't know how many people are trapped.Also, the Associated Press reports there are multiple injuries, but exactly how m ...