Giant Eagle is pulling Farmers Market bagged salad and lettuce with a "best by" date of May 12-29 from its shelves.

The products may have been contaminated by Listeria monocytogenes, which can cause serious -- and sometimes fatal -- illness in children and older people.

River Ranch Fresh Foods of California voluntarily recalled the products after learning of the possible contamination. 

No illnesses have been reported.

Click here for a complete list of the recalled Farmers Market products.

Giant Eagle is calling customers who may have purchased the products between May 1 and May 18 and asking them to dispose of the lettuce or return it to the store for a refund.

For more information, the company is telling customers to call 800-762-7708.