Clairton, Aug. 12 -- A series of powerful blasts tore through a steel plant near Pittsburgh in Pennsylvania on Monday, killing one worker and leaving another unaccounted for, media reports said.

Ten others were hurt as flames and thick smoke poured from the site, sparking an urgent search for the missing employee.

The blasts at the Clairton Coke Works - part of a sprawling industrial complex along the Monongahela River - took place just before 11 am ET (1500 GMT), BBC reported.

Firefighters battled flames and heavy smoke that billowed out of the plant, which is owned by US Steel, a subsidiary of Nippon Steel 5401.T.

Initially, two people were reported missing. One person was found and transported to a local hospital, said Allegheny Cou...