Tesco admits its Every Day Value Spaghetti Bolognese contains horse meat Tesco, Britain's largest supermarket, was dragged further into the horse-meat scandal tonight when it admitted that a second of its beef products was heavily contaminated as, the growing crisis prompted ministers to announce a European emergency summit this week. The retailer, which was forced four weeks ago to withdraw adulterated burgers, announced that tests had shown its Every Day Value Spaghetti Bolognese contained in excess of 60 per cent horse meat. The supermarket apologised, saying it recognised it had failed customers twice. The ready meal was produced by the same French-based company - Comigel - that supplied the frozen food giant Findus with a beef lasagne found last week to be 100 per cent horse meat. Tesco said it would not be using the Comigel facility again, suggesting the company had failed to follow the correct production process. The announcement followed a warning from embattled Environment Secretary Owen Paterson of further "bad news" from tests to uncover the extent of horse-meat contamination in processed beef products on British supermarket shelves and food served in schools and hospitals. The Food Standards Agency (FSA) announced that companies supplying schools, hospitals, prisons and the armed forces will be included in tough new tests and public-sector bodies should "reject or withhold stock" from any supplier unable to comply with guidelines. Mr Paterson, who faced accusations of incompetence from his Labour shadow, who outlined plans for the compulsory tests for all UK producers and retailers, said the problem could only be solved at a European level and announced an emergency meeting of European Union agriculture ministers on Friday. Tesco said it was "very sorry" for the discovery of adulteration in the spaghetti bolognese product, which was withdrawn from sale last week. It said three of the samples tested showed levels of horse DNA in excess of 60 per cent. Tim Smith, the supermarket's technical director, said: "The source of the horse meat is still under investigation by the relevant authorities. The level of contamination suggests that Comigel was not following the appropriate production process... and we will not take food from the facility again. Amid growing recriminations and mushrooming lawsuits across Europe over the apparently criminal entry of horse meat into processed beef products, Romania insisted that two abattoirs suspected to be the origin of the contamination had been cleared of any wrongdoing. Speaking after the authorities in Paris and London had pointed the finger at Romania, Victor Ponta, the country's Prime Minister, said its accusers had deliberately chosen a soft target. He said: "I am very angry, to be honest. From all the data we have at the moment, there is no breach of European rules committed by companies from Romania or on Romanian territory. Mr Paterson told the House of Commons that suspicions remained that criminals had infiltrated the complex - and until recently largely unmonitored - supply chain across multiple European countries. He said: "It does look as if there are criminal actions on the Continent." The development came as Downing Street moved to quash concerns that a veterinary drug used on horses represents a risk to human health. Mr Paterson said at the weekend that ongoing tests, due to be published on Friday, might discover substances "injurious to human health," but emphasised there was as yet no evidence of their presence. The chief medical officer, Dame Sally Davies, said that even if the drug - phenylbutazone or "bute" - is discovered in low levels in processed meals found to contain horse meat, it represented a "very low risk indeed" to human health. In rare cases, "bute" can trigger a serious blood disorder. Tesco said last night that tests for bute in its spaghetti bolognese had been negative. The meat's journey is believed to have started at two slaughterhouses in Romania. After an investigation into where it was first labelled "beef," the country's Prime Minister said no EU rules had been broken. An investigation showed that the meat then passed to an unnamed Dutch trader. The Netherlands authorities said no investigation was open but they were prepared to carry one out, if necessary. According to French food safety authorities, the meat then passed through the hands of a Cypriot dealer, who is yet to be identified. The French company Poujol purchased the frozen meat from Cyprus, before sending it over the border into Luxembourg. In Luxembourg, a factory owned by the French company Comigel - a Findus supplier - processed the meat. The Swedish brand Findus, having bought it in, sold it as beef lasagne all over Europe, including in the UK and Ireland.