LONDON — Sweden on Friday became the newest European country to be hit by a widening meat products scandal, as frozen food company Findus said it was recalling beef lasagna meals there after tests confirmed the products contained horsemeat.

Already, Britain, Ireland, Poland, and France have been drawn into the growing saga over the use of horsemeat and the apparent mislabeling of products along the supply chain. Millions of burgers have been recalled in recent days due to the scandal.