Whole peeled onions (Martin Poole/Thinkstock)

OXNARD, Calif. (AP) — A Southern California grower and food processing firm has expanded its voluntarily recall of packaged onions and celery because they may be contaminated with Listeria monocytogenes.

The U.S. Food and Drug Administration and Oxnard-based Gills Onions LLC say no illnesses have been linked to the recall.

Gills Onions initially announced a recall on July 18. The product list was expanded on Thursday to include diced, slivered and whole-peeled onions and diced onion and celery mix with use-by dates on or before Aug. 3.

The recalled products were shipped to stores in California, Arizona, Colorado, Illinois, Montana, New York, Oklahoma, Oregon, Pennsylvania, Texas, Utah, Washington and Canada.

The FDA and Gills officials are investigating the cause of the contamination and how Listeria was found in its plant.

Calif. Food Processor Recalls More Onions, Celery 27 July,2012KQED News Staff and Wires

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