Taco Bell has become one of the latest companies to be found with trace amounts off horse DNA in its beef in tests conducted by Britain’s Food Standards Agency.

BBC News reports four beef products sold by Taco Bell, Bird’s Eye, and catering supplier Brakes were found to contain horse DNA, citing the FSA.

The products include Taco Bell’s Ground Beef, Birds Eye’s Traditional Spaghetti Bolognese and Beef Lasagne, and Brakes’ Spicy Beef Skewer, according to BBC News.

Nearly 1,800 products were examined in the latest round of tests, BBC News reports.

A Taco Bell spokesperson tells BBC News they “immediately voluntarily tested our product” in the three Taco Bell restaurants in the UK upon learning of the test results.

“Based on that testing, we learned ingredients supplied to us from one supplier in Europe tested positive for horsemeat,” the spokesperson told BBC News.

The spokesperson says the products were “immediately” withdrawn from sale and discontinued purchases of the meat.

Read more: BBC.co.uk