Steel, Pennsylvania and explosion
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The Pennsylvania county where an explosion at a U.S. Steel plant south of Pittsburgh killed two people and injured more than 10 others announced Thursday that it is stepping up air quality monitoring in the area of the sprawling facility that has a troubled environmental record.
The explosion took place at the US Steel Clairton Coke Works plant, located south of Pittsburgh, Pennsylvania.
Emergency responders are working to free people trapped under rubble at the Allegheny County plant, the Associated Press has reported.