Salami on sale in the UK could contain horse and donkey meat, the Food Standards Agency (FSA) has revealed.
Consumers could be unwittingly eating horse meat
The warning follows an investigation into the exact ingredients of salamis and similar products such as chorizo and pastrami.
Local authorities in Hull, Durham, Northumberland, North Yorkshire and West Yorkshire tested 24 salamis.
Three of the samples were found to contain horse meat - but none of them declared it in the list of ingredients.
Rosemary Hignett, the FSA's head of food labelling, said: "There are concerns that UK consumers could unwittingly be eating horse and perhaps donkey meat when they buy salami or a similar product.
Salami was tested in...
"Some people may prefer not to eat these products, even though food safety is not the issue and they are often traditional recipes."
Ms Hignett said the FSA was now planning to undertake a major survey of salami-type products to reveal the extent of the problem.
She added: "It is important that people know what they are eating and can make an informed choice about whether or not they want to eat it."
The Agency will investigate more than 100 meats from supermarkets, delicatessens and catering suppliers over the summer.