Wal-Mart says it’s pulling an offensive skull-and-crossbones T-shirt from its shelves. The decision comes after a Maryland blogger pointed out the image was identical to a Nazi SS emblem from World War II.

Wal-Mart said it was not aware of the origins of the image until they saw the post on a site run by Rick Rottman, a Navy veteran. Rottman told The Associated Press by telephone Monday that he’d seen the shirts in three Maryland Wal-Mart stores over the weekend.

The design is a distinctive image of a squat-looking human skull slightly angled to the side. A Wal-Mart spokesman said the retailer also is reviewing its process for checking products in an effort to ensure this never happens again.