U.S. Customs officials say they have been investigating reports of another contraband item coming across the U.S. Mexico border.

The custom’s department’s San Diego Field Office has recently noticed an increase in the number of eggs intercepted at ports of entry, according to Operations Director Jennifer De La O.

Uncooked eggs are prohibited to be exported from Mexico into the U.S. due to the risk of bird flu and Newcastle disease.

Failure to declare agriculture items can result in penalties of up to $10,000.

Record high egg prices have been making headlines in recent months.

According to then USDA, in the major Midwest production region, the wholesale price for large eggs delivered to warehouses decreased $0.75 to $3.87 per dozen.

Consumer demand for eggs continues decline as newly minted diets fade just as holiday bills are appearing in mailboxes across the country at a time when shell egg prices remain at unappetizing levels in retail outlets relative to other proteins.

While demand remains higher than year ago levels, last year demand was trending higher.

High consumer prices for eggs has caught the attention of the national media, raising consumer awareness and fueling a rising resistance.