An investigation is under way in the UK after traces of meat were found in vegetarian and vegan pre made meals available at Sainsbury's and Tesco.
British newspaper The Daily Telegraph is behind the tests, and has confirmed that two supermarket products have traces of meat - even though they are labelled both kosher and suitable for vegans and vegetarians.
Sainsbury's Meat Free Meatballs were found to have traces of Pork and Tesco's Butternut Mac had traces of Turkey, both specifically labelled safe for vegans.
Not only has the discovery upset vegans, but Jewish and Muslim groups are concerned that against their religious beliefs, they have inadvertently eaten pork.
Animal rights group People for the Ethical Treatment of Animals (PETA), which promotes veganism and previously endorsed Tesco's Wicked Kitchen range, told Daily Mail the findings "will come as a massive shock to many including, we suspect, those producing the food."
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Both supermarkets are testing the products themselves, and have thus far have not found any traces of meat.
The issue is now in the hands of the Food Standards Authority.