Iran Press/ America: No one was injured in the blast, which happened at the D blast furnace at the plant, according to the Burns Harbor Fire Department.
Images released by CBS show firefighters extinguishing the flames next to the ruins caused by the blast.
A spokesman for the ArcelorMittal Steel Plant said the blast was caused by a problem in one of the furnaces and was shut down immediately after the blast.
ArcelorMittal spokesman William Steers said the fire was caused by a stove dome failure, and the furnace was taken safely offline at the complex, located about 20 miles (32 kilometers) southeast of Chicago.
The explosion occurred less than a year after a cyanide spill at the plant killed fish in the area and forced the closure of area beaches.
In January 2020, the state sent a letter to ArcelorMittal alleging the company had manipulated test results by redoing tests that showed violations and using new tests to replace those results.
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