Beef burgers being sold in the UK and Ireland have been found to contain horse meat, the Republic of Ireland's food safety authority (FSAI) says.
The meat came from Liffey Meats and Silvercrest Foods in Ireland and Dalepak Hambleton processing plant in the UK and was on sale in Tesco, Iceland, Lidl, Aldi and Dunnes Stores.
The FSAI found that of the 27 beef burger products that were tested, 10 contained horse DNA and 23 were positive for pig DNA.
While nine out of 10 beef products showed low levels of horse DNA, one sample from Tesco showed that horse accounted for 29 per cent of the meat.
Traces of horse meat were also found in raw ingredients imported from Spain and the Netherlands.