BRENHAM, Texas (AP) – Blue Bell Creameries has issued a voluntary recall for all of its products on the market after two samples of chocolate chip cookie dough ice cream tested positive for the potentially deadly bacteria listeria. 

Blue Bell's chief executive Paul Kruse says the company “cannot say with certainty'' how the bacteria was introduced to its facilities.

Blue Bell's recall includes ice cream, frozen yogurt, sherbet and frozen snacks distributed in 23 states and international locations.

For more information, consumers can call 1-866-608-3940 or got to bluebell.com.