"Sodexo have said: 'The service at the Scottish Parliament is not affected regarding the equine DNA issue'."
In a statement, the firm said: "Sodexo has had a proactive programme in place to ensure that there is no horsemeat in its supply chain.
"We demanded written assurances from across our supply chain that the products we purchase did not contain horsemeat, and additionally implemented an internal sampling programme. Despite repeated guarantees from our suppliers, our sampling has identified a frozen beef product which tested positive for equine DNA. This situation is totally unacceptable.
"We felt the only appropriate response was to withdraw not only this product but all frozen beef products. We will only re-admit into our catering operations products that have affirmatively passed DNA testing, pursuant to laboratory test criteria."
The company has launched an investigation into how beef products were contaminated with horse.