Tinned sardines sold in major UK supermarkets are being recalled because they could be unsafe to eat.
Food giant John West is recalling its 95g boneless sardines in sunflower oil and 120g normal sardines in olive oil over the health fears.
John West said certain tins may pose a "microbiological contamination risk".
Affected tins are sold in Morrisons, Waitrose, Tesco, Ocado, Amazon, EH Booth, James Hall, Century Park, Co-operative and James Wilson stores.
The company has not said what the exact risk is, but is recalling sardines with the batch codes 109, 110, 111, 112 and 113, best before December 2026.
The Food Standards Agency (FSA) regulator said: "If you have bought either of the above products do not eat them. Instead, return them to the store from where they were bought for a full refund."
John West said: "We are undertaking extensive scientific testing to identify the cause of the potential contamination. We would like to stress that this recall is purely a precautionary measure.
"The safety of our products and the wellbeing of consumers is our highest priority. Therefore, whilst the potential risk to consumers is extremely low, we are recalling all cans from those batches as a precaution. None of John West’s other products are affected by this recall.
"We apologise to all our shoppers for any inconvenience or concern this causes."
The last time John West had to recall food was back in February 2020 - also sardines.
At the time, the company said bacterial contamination had caused a "small number" of cans to swell up.
Product recalls occur when there may be an issue with the food item that means it should not be sold - this could be in relation to various potential dangers including contamination, misleading or incorrect labels and allergens.
When there is a food allergy risk, the FSA will issue an allergy alert.
Reasons for recalls include the wrong ingredients being used, contaminants including small pieces of glass and metal and wrong 'use-by' dates.
Products can be recalled for containing metal - and even insects.
A major recall was issued by chocolate maker Kinder earlier this year after fears its products were linked to an outbreak of salmonella .
Some 63 people have become ill with the disease, with a huge number of cases being kids aged five or younger.
Symptoms caused by salmonella usually include fever, diarrhoea and abdominal cramps.
Most cases will clear within a few days, but in some examples, symptoms can be severe and lead to hospital admission.
The recall came after investigations led by the UK Health Security Agency (UKHSA), Public Health Scotland, Public Health Wales and Public Health Agency Northern Ireland found a possible link between salmonella and Kinder Surprise chocolate.
The FSA said the eggs were all made at the same factory in Belgium.
