Dioxin had been discovered above permitted levels in eggs from a German farm but local authorites have stated that they see no danger to the public.
Dioxin content of three to six times permitted levels were discovered by routine tests on a farm in the central German state of North Rhine Westphalia, the state agriculture ministry said. The farm has been sealed off and is not permitted to sell more eggs.
How the dioxin came into the eggs is unclear and intensive investigations are underway, the ministry added. Tests had shown no contamination of animal feed at the farm.
In January 2011, an EU-wide health alert was issued when German officials said animal feed tainted with highly poisonous dioxin had been fed to hens and pigs, contaminating eggs, poultry meat and pork at the affected farms.
Germany then introduced a series of new measures including tough restrictions on animal feed ingredients.