The FSA said: “This is in connection with a potential link to a salmonella outbreak. A number of these cases have been young children.”
Public health agencies led by the UK Health Security Agency (UKHSA) reportedly found a link between cases of salmonella poisoning across the UK and the Kinder eggs.
Salmonella symptoms include diarrhoea, stomach cramps, nausea, vomiting and fever.
The products affected are 20g eggs or three-packs of eggs with best before dates between 11 July and 7 October 2022.
In a statement, Ferrero said: "The company takes food safety extremely seriously and we sincerely apologise for this matter." As a precautionary measure, the Italian confectioner has recalled the products and people are being advised not to eat them.
The FSA said the eggs were all manufactured at the same factory, believed to be in Belgium. Other Ferrero products are not thought to be affected.
Anyone who has bought products in the specified date range is advised to contact the Ferrero consumer care department at firstname.lastname@example.org or by calling 0330 053 8943 to obtain a full refund.