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.

The Food and Drug Administration has updated an ongoing recall of tomatoes to its most severe level, warning there is a high risk of "serious adverse health consequences or death" to those who consume affected products.

What was once a cautioned recall due to the possible presence of Salmonella in tomatoes sold in three states is now labeled as "deadly."