A Cadbury spokesman announced Monday its Chinese made chocolates are tainted with the industrial chemical melamine.
Preliminary test results could not point out just how much of the chemical the chocolates contained.
China has been hit hard by a recent food safety scandal after melamine was discovered in baby milk powder.
Four deaths have been blamed on the tainted milk, and some 54,000 children have developed kidney stones or other illnesses.
Cadbury has not said if they plan to announce a recall.