Williams Farms Repack issued a recall for the tomatoes, the FDA announced last month. It's now labeled deadly.

A batch of South Carolina-grown tomatoes from William Farms Repack LLC sold in the state was recalled by the FDA for potential salmonella contamination.

A tomato recall due to risk of salmonella contamination has been designated as Class I, the U.S. Food and Drug Administration's highest warning level, the agency said. The FDA marked the tomato recall affecting three states as Class I, meaning there is a risk of "serious adverse health consequences or death," on May 28.