NEW : Taco Bell says its domestic markets have not been affected . It pulls all beef products from its three US restaurants . Fast food giant Taco Bell said Friday it has taken beef off the menu in its three UK outlets after tests on ground beef from a European supplier revealed traces of horse meat . Beef from a European farm tested positive for traces of horse DNA , a spokesman said . Europe 's meat industry has been in turmoil over the discovery of rogue horse DNA .
NEW : Taco Bell says its domestic markets have not been affected . It pulls all beef products from its three US restaurants . Beef from a European farm tested positive for traces of horse DNA , a spokesman said . Europe 's meat industry has been in turmoil over the discovery of rogue horse DNA .