Kellogg’s is recalling certain types of its Mini-Wheats breakfast cereal over fears that it could contain metal fragments from a faulty manufacturing part.

The recall is said to affect at least three million boxes of Mini-Wheats cereal. The products were sold in Canada, the United States and Mexico.

In Canada, the recalled cereals include:

  • Mini-Wheats Original Frosted cereal
  • Mini-Wheats Brown Sugar Flavour Frosted cereal

Most of the products have best-before dates between April 1, 2013 and July 29, 2013.

Kellogg’s has warned that tiny pieces of “flexible metal mesh” could be in the cereal.

Concerned consumers in Canada can call Kellogg’s at 1-888-876-3750. The line is open between 8:30 a.m. and 4:30 p.m. from Monday to Friday.

To determine whether your cereal has been affected, a full-list of products recalled in Canada is available through the Canadian Food Inspection Agency.