Newry and Mourne Council's environmental health department said that DNA tests on samples of burgers made at Freeza Meats were found to be free from non-beef DNA.
A statement from the council said that twelve samples of Polish meat belonging to another company were being stored in freezers on the company's premises, but that they had been detained due to "queries" about traceability:
Two of these samples contained approximately 80% horse DNA. This meat had been detained for the last five months due to the condition of its wrapping and queries regarding its labelling and traceability.
More top news
A study into the effects on LSD on the brain could aid the treatment of depression, the government's former drugs tsar has said.
Plumbers and heating engineers should be trained to help people living in homes that are too cold, according to new health guidelines.
Rain for the northwest, dry and cold elsewhere