Heavy smoke rose from US Clairton Coke Works plant on Monday morning (Picture: Twitter)
A massive explosion at a Pennsylvania plant has left one dead and dozens injured.
The US Steel Clairton Coke Works exploded shortly before 11am on Monday, setting off a loud boom in the Pittsburgh area.
Five people were rushed to hosptials.
At least two people are missing.
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The plant plant is about 15 miles southeast of Pittsburgh.
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