Braga Fresh, based in California, issued a product warning for Marketside Broccoli Florets, the FDA announced last year. It's now labeled deadly.

The FDA has upgraded a recall issued on 12-ounce Marketside Broccoli Florets that were initially sold at select Walmart stores across the United States.

The Food and Drug Administration has upgraded its classification of a broccoli recall initially reported in late December, labeling it as “Class I” — the agency’s most serious recall