The Agriculture Minister said that his Department's investigation into the presence of horse meat in beef products, focused on a cold store in Naas this week.
Simon Coveney said QK Cold Stores had informed the department that consignments of frozen beef trimmings imported from Poland, were tested by them and some showed positive for horse DNA.,
These consignments were either returned to the Polish companies concerned or were under detention by the department at the cold store.
Mr Coveney said the company had confirmed that none of the consignments that tested positive for horse meat, were released onto the market.
European Union governments have ordered an EU-wide programme of DNA tests on beef products, to assess the scale of the horse meat scandal.
In Britain, Hospitals, schools and pubs are among the latest to admit they have served up food containing horsemeat.