The Czech State Veterinary Administration reported its findings to the European Union's Rapid Alert System for Food and Feed.
The inspectors took samples for DNA tests in IKEA's unit in the city of Brno from a product labelled as "beef and pork meatballs", a statement said.
It added that the consignment of meatballs that was tested had not been distributed to consumers.
A spokesman for the institute said he did not know whether the meatballs were distributed in other European countries.
IKEA said they were made by a single Swedish supplier.
More top news
The singer, 31, said on Twitter that she and her partner Jonathan Powell were grieving their loss.
A fine evening ahead to the south with some late sunshine in places.
Prince Charles and the Duchess of Cornwall have visited Manchester Arena, the site of a suicide bombing in May which left 22 people dead.