Multiple explosions at a steel plant near Pittsburgh have killed two people and left 10 others injured on Monday, according to authorities. Video captured a massive black plume of smoke rising from the U.

The explosion rocked the Clairton Coke Works, about 10 miles south of downtown Pittsburgh and one of four U.S. Steel plants in PA.

At least one person has died, and one person remains unaccounted for, while at least 10 people have been injured following multiple explosions at the U.S. Steel Clairton plant.