More than 1,400 pounds of alfalfa sprouts sold in three states have been voluntarily recalled by SunSprout Enterprises over possible salmonella contamination, according to the Food and Drug Administration.

After initially recalling more than 800 pounds of alfalfa sprouts sold in 4-ounce packages on Thursday, SunSprout Enterprises of Fremont, Nebraska, expanded its voluntary recall to include another 600 pounds, some sold in 2½-pound packages.

The recalled sprouts were sold at grocers and distributed to food service companies in Nebraska, Kansas and Iowa between late November and mid-December. A preliminary investigation by Nebraska’s public health department linked a salmonella outbreak spanning at least 12 people to the consumption of alfalfa sprouts consumed at restaurants or at home.

SunSprout Enterprises said it initiated its recall in response to the outbreak “out of an abundance of caution,” while it “further investigates how this alfalfa product was handled and stored after it left its Nebraska facility.”

The company said it had not received any complaints or reports of illness caused by the product.

What else is under recall?: Check out USA TODAY's searchable database.

Salmonella are illness-causing bacteria. Infections often cause diarrhea, fever, stomach cramps and other symptoms, according to the Centers for Disease Control. Most people can fight off the infection without the use of antibiotics, but severe cases may require hospitalization and can be fatal, according to the CDC.

SunSprout Enterprises advised customers to toss the recalled product, which have lot codes 4211, 5211, 3212, and 4212 and “best by” dates between 12/10/2022 and 1/7/2023.

Contributing: Mike Snider

Another salmonella recall: Wegmans recalling kale and spinach mix, micro greens, cat grass

This article originally appeared on USA TODAY: Sun Sprouts alfalfa sprouts recall expanded after salmonella outbreak