A fire Monday at the US Steel mill, 20 miles south of Pittsburgh, hurt 10; 1 person is missing. Residents within a mile are advised to stay indoors.

The deadly explosions that happened Monday at U.S. Steel's Clairton Coke Works facility come following several different incidents at the plant over the past several years, including one incident in February. A flaring and fire at the Clairton plant in February sent two people to the hospital.

One person has died, one person is unaccounted for and at least 10 are injured following an explosion at a U.S. Steel plant near Pittsburgh, Allegheny County Police Assistant Superintendent Victor Joseph said at a press conference Monday afternoon.