The salad had been bought at a Tesco store in Burnham-on-Sea (UK).
A Tesco spokesperson said: “We take matters of this kind extremely seriously and are very disappointed to learn of this incident.
“Ensuring our food is of the highest quality is extremely important to us and we and our suppliers have robust systems in place to prevent foreign objects getting into products. We will of course be conducting a thorough investigation into this incident. We are in contact with the customer and have apologised.”
Source: Tesco
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