Walmart stores in the United States will no longer sell tobacco products to people under 21 years of age, effective July 1.

The company made that announcement in a statement from John Scudder, U.S. chief compliance and ethics officer for Walmart, Inc., on Wednesday.

In another change, the company is in the process of discontinuing the sale of fruit- and dessert-flavored electronic nicotine delivery systems, which U.S. Food and Drug Administration research has shown to be preferred by minors.

"We unequivocally acknowledge that even a single sale of a tobacco product to a minor is one too many, and we take seriously our responsibilities in this regard," Scudder wrote in a letter to the FDA dated May 8.

This developing story will be updated.