Bags of cereal have been taken off the shelves at Sainsbury's supermarkets after moths were found in the product, the Food Standards Agency has said.
Customers have been advised to dispose of the cereal
The store said a "very small batch" of its own-brand Fruit & Nut Muesli was withdrawn after customer complaints.
The FSA said the problem related to 1.5kg bags of the cereal with batch codes beginning with the number 6213.
Notices in stores advise customers to dispose of the cereal contents and return the packaging for a refund.
The move comes after boxes of Quaker Oats were pulled from stores because of the presence of moth pupae and larvae.
Sainsbury's said it has launched an investigation.
"It is a very, very small issue," a spokeswoman said.
"As soon as the issue was identified through an increase in customer complaints, the product was withdrawn from stores."
On October 5, Quaker Oats said it had withdrawn about 750 of its 1kg cartons containing a free measuring cup, after an infestation was found.
The boxes were sent to Tesco and Sainsbury's stores in the north of England from depots in Middlewich, Cheshire, and Haydock, Merseyside.
The FSA said there was no known health risk and no other Quaker Oats products were known to be affected.