State officials are expanding their warning about contaminated cookies being sold in Minnesota.

The Minnesota Department of Agriculture is warning consumers to avoid eating any Wonderfarm brand cookie-type biscuits due to melamine contamination.

Melamine is a synthetic chemical with various industrial uses. It has been associated with numerous food recalls linked to products made in China and Southeast Asia.

Two weeks ago, the Agriculture Department issued a consumer advisory for Wonderfarm cookies after melamine was found in Wonderfarm's "Successful" variety of cookies.

Now further state testing has detected melamine in three additional Wonderfarm varieties: "Royal Flavour Biscuits", "Lovely Melody Biscuits" and "Daily Life Biscuits."

State officials are urging consumers to immediately dispose of any Wonderfarm brand cookie products, which are made by Interfood Shareholding Co. in Vietnam.