Police in the Irish Republic have been called in to investigate how pigs in the country came to be contaminated with potentially harmful dioxins.
The source is thought to have been feed tainted with oil from a Co Carlow firm which recycles food into pig meal.
Millstream Power Recycling Ltd said it was investigating how the firm’s "strict health and safety procedures... could possibly have been breached".
The risk is said to be low, but people are advised not to eat any Irish pork.
The advice also currently includes pork products from Northern Ireland as nine farms there - in addition to 47 in the Irish Republic - were supplied with the same feed being linked to the contamination.
The Irish Republic’s chief vet believes contaminated pork products may have been exported to up to 25 countries.
