An explosion at the U.S. Steel Clairton plant has resulted in at least one fatality and multiple injuries. Two individuals remain unaccounted for following the incident. Emergency responders are on the scene, and an investigation is underway to determine the cause of the explosions. The Clairton plant is a major coke-producing facility, and the incident is likely to have significant impacts on local operations and potentially broader supply chains. Further updates will be provided as more information becomes available from U.S. Steel and relevant authorities.