The leading French eggs association has sounded alarm over the import of hundreds of thousands of eggs from Ukraine, warning they breach with European production standards and may contain banned antibiotics.

Since spring, several batches of eggs from Ukraine with a code 3 -- meaning the hens are battery caged -- have been seen in various French supermarkets, said the National Committee for the Promotion of Eggs (CNPO) in a statement late Thursday.

The eggs were spotted at giant retailers Carrefour and E. Leclerc, according to the CNPO, which unites all the major players in the French egg industry.

"One store took a regrettable action," admitted E. Leclerc in a statement, adding that this was "an isolated case, which absolutely does not correspond to the brand's purchasing policy."

"As

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