The price of eggs at U.S. grocery stores has climbed to a record high, nearly doubling from a year ago, as outbreaks of bird flu have led to shortages by wiping out millions of hens.

Eggs are being confiscated at the U.S. border with Mexico amid a bird flu outbreak that has depleted chicken populations.

People are trying to smuggle eggs across the southern border, authorities said, as prices continue to increase amid a shortage caused by the bird flu.