The boss of Jersey Dairy says an investigation is underway into the source of a contaminant that has forced a recall of some batches of milk and butter.
Around 1200 litres of green (2.5% Fat Reduced) milk with a use-by date of 23 March and 250g packets of unsalted butter with a use-by date of 8 June have been withdrawn from sale.
A chemical contaminant was detected, making them unfit for human consumption and prompting an urgent recall notice.
Managing Director Eamon Fenlon told Channel 103:
"We believe it is an oil residue that has happened on a farm. It is currently under investigation.
"I can't give you a definitive answer until that investigation is complete, but the balance of probability is that it is an oil residue that has managed to get into part of the milking systems on a farm."
The dairy is working with Public Health and an expert advisor from the UK.
Mr Fenlon says the low level of contamination (estimated at one parts per million) means it shouldn't cause any illness - and no one has been reported ill.
"We don't take any risks with food safety."
The affected products were dispatched on Wednesday and Thursday (11 & 12 March)
People with milk or butter in their fridge that is from the batches that have been recalled should return to them to the shop.
"Our team has been contacting wholesalers, retailers and coffee shops to notify them.
"We are arranging with the retailers to refund them for any that they refund."

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