U.S. Steel Corp. is the target of father-son tandem racial discrimination lawsuits for activities alleged to have occurred at its plant in Gary, Ind.

The Pittsburgh-based steelmaker declined to comment on the lawsuits Friday, citing company policy to not comment on matters before the court. Company attorneys have filed replies denying most of the claims.

A report in the northwest Indiana Times said the father and son are suing the Gary Works for incidents involving what were termed "white supremacist intimidation" at the plant.

According to the report, David...