The Food Standards Agency say that burgers' sold in Gwynedd have been withdrawn from sale after they were found to contain horse DNA.
The burgers were made at the Burger Manufacturing Company (BMC) in Builth Wells that previously tested positive for horsemeat.
In a statement on their website, the FSA said that samples taken from products purchased at Nefyn Pizza & Kebab House in Gwynedd were found to contain "horse DNA at or above the 1% threshold for reporting."
Last month the FSA announced it had ended its investigation at BMC, as further tests revealed that the presence of horse DNA below 1%.
The FSA says that the product was not found to contain the veterinary drug bute or pig DNA.