The FDA is issuing a heightened warning for eggs sold at Costco stores that were previously recalled due to potential salmonella contamination and reclassifying it to its highest risk level.

FDA escalates Costco egg recall to Class I, its highest risk level, over salmonella concerns. Learn what Class I means, how recalls escalate, and what it means for you.

A major Costco egg recall due to possible salmonella was recently upgraded to a higher level by the Federal Drug Administration, NBC News reported, with officials saying those who consume the products could suffer "serious adverse health consequences or death.