A Louisiana steel mill unexpectedly laid off 376 employees and said it will shut down its factory as the governor suggested tariffs may have played a role in the closure.

Bayou Steel Group’s Louisiana plant is expected to close by the end of November.

This closure is also affecting 72 steelworkers in Harriman, Tennessee. The layoffs there at the plant in Roane County started Monday.

In a statement released yesterday, Bayou Steel Group said it was filing for Chapter 11 bankruptcy protection.