Trader Joe’s has recalled two of its cookie products after discovering they might contain rocks, the grocery chain announced Friday.

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The affected products are Trader Joe’s Almond Windmill Cookies with a sell-by date between Oct. 19 and 21, and its Dark Chocolate Chunk and Almond Cookies with sell-by dates from Oct. 17 through 21.

The supplier of the two types of cookies alerted Trader Joe’s that the products may contain rocks, and all potentially affected cookies have since been removed from shelves and destroyed, according to the company's announcement.

The recall notice urged customers who bought the cookies to not eat them, and to visit a store for a full refund. Trader Joe’s representatives declined to offer further detail about the recall beyond the published statement.