Federal food regulators raised their alarm for recalled eggs sold from Costco stores over possible salmonella exposure, reclassifying the targeted product to its highest risk level.

The Food and Drug Administration has classified a recall of eggs sold at Costco caused by potential salmonella contamination as the highest risk level for infection. The voluntary recall last month was of 10,

The FDA has classified its recall of eggs sold under Costco's Kirkland brand as a Class I recall, a designation reserved for instances of the highest potential health risk — including death.