By MARC LEVY, MICHAEL CASEY and PETER SMITH Associated Press

CLAIRTON, Pa. (AP) — Workers were pushing coke out of huge ovens and preparing for maintenance when an explosion rocked a U.S. Steel plant outside Pittsburgh, a company executive said Tuesday, a day after the blast killed two workers.

The explosion, which was powerful enough to shake nearby homes, injured more than 10 other steelworkers, including one who spent hours trapped in rubble. It also knocked down a wall, scorched a pickup truck and sent a huge plume of black smoke into the air.

Initially, the plant’s own fire department and local responders rescued some of the workers. When it was determined that the area wasn’t stable enough for the rescue workers to continue their efforts, a specialized rescue team went in, said Ma

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