Coca-Cola is recalling 2,000 cases of Diet Coke, Sprite and Fanta Orange soda cans because they may contain “foreign material.”

The recall comprises 12-packs of 12-ounce cans, including 1,557 packs of Sprite, 417 of Diet Coke and 14 of Fanta Orange. The cases were distributed in Alabama, Mississippi and Florida, an FDA filing shows.

It remains unclear what the potential “foreign material” could be and what risks, if any, it poses to consumers. The FDA did not immediately respond to CBS MoneyWatch’s request for comment.