Asda said its announcement that traces of 'bute' have been found in one of its products is part of its commitment to keep customers up-to-date on its product testing regime.
The supermarket says its has carried out "more than 700" tests since news of the horsemeat scandal broke. A statement released today said:
In March 2013 we withdrew tinned Smart Price Corned Beef (340g) after receiving a positive test for horse DNA above the 1% trace level set by the Food Standards Agency.
Today ... tests on further batches have shown a positive result for very low levels of horse medication called phenylbutazone, also known as bute, at 4 parts per billion.
The FSA has reassured us that the quantities we’ve found pose a low risk to human health ...
More top news
A daughter kissed her "dead" mother goodbye - only to find out that the hospital had made a mistake and her mother was still alive.
A nurse trying to identify a badly wounded hit-and-run victim suffered heartbreak when she discovered it was her own brother.
So-called Islamic State has blown up yet another monument in the ancient city of Palmyra, activists say.