The discovery was made during a routine testing process
Chocolate maker Mars has issued a voluntarily recall of some products due to potential presence of salmonella.
The warning, issued for several products across Ireland and the UK, is because of potential contamination from the ingredients used in making chocolate.
Some Galaxy products - including Smooth Milk Chocolate bars, Minstrels, Counters and Teasers are affected.
The discovery was made during a routine testing process.
The firm says no other brands or varieties of chocolate, pack formats, bar sizes or best before dates are affected.
"The precautionary recall in the UK and Ireland concerns only the products below with the following best before dates distributed by Mars Chocolate UK and Mars Ireland", it adds.
It says a small amount of units distributed in both countries could potentially be affected.
"The retrieval of this product is to ensure the confidence and safety of our consumers."
"A small number of these products have been distributed, and although we've had no related complaints, as a precaution we have made the decision to voluntarily recall the products potentially affected by this issue in order to ensure the safety and confidence of our consumers," Mars says in a statement.
Anyone who has one of the products listed should not eat it and are advised to contact the Mars Consumer Care team on 1890-812-315 or www.mars.ie/contact to arrange return and reimbursement.