The U.S. Food and Drug Administration is advising the public not to eat alfalfa sprouts produced by the Tiny Greens Organic Farm in Urbana, Ill., because of possible salmonella contamination.

The warning issued Monday evening also includes a mix called Spicy Sprouts, which also contains radish and clover sprouts.

The sprouts were distributed to various customers, including farmers' markets, restaurants and groceries, in Illinois, Indiana, Iowa, Missouri and possibly other Midwestern states. 

The FDA says preliminary results of the investigation of a multistate outbreak of salmonella infections indicate a link to Tiny Greens alfalfa sprouts served in sandwiches at Jimmy John's restaurants.

But Tiny Greens owner Bill Bagby Jr. says not one sample of his product taken by health authorities has come back positive for salmonella contamination.