The nation's largest retailer said Friday that it will complete its exit from e-cigarettes after selling through current inventory. It cited growing federal, state and local regulatory complexity regarding vaping products.

A sixth person has died in a spate of possible vaping-related illnesses in the U.S.

There have been at least 450 possible cases, including five deaths, identified in the U.S. this year and many said they had been vaping THC, the chemical that gives marijuana its high.