The U.S. Food and Drug Administration has issued a Class I recall, its most serious warning, for a line of Dubai-inspired chocolate bars sold in the United States due to potential contamination.

The affected products, which gained popularity on social media for their luxurious branding, have been linked to an unspecified health risk prompting urgent advisories for consumers not to eat them.

Several retailers have already begun pulling the items from shelves as investigations continue into the source of the contamination.