Warsaw (AFP) - Several EU countries on Friday seized and destroyed suspect beef from a Polish slaughterhouse where allegedly sick cows were butchered, as French authorities said some of the meat had already been sold to customers.

Warsaw has attempted to reassure affected countries and says the meat does not pose a health risk.

Poland's chief veterinarian Pawel Niemczuk confirmed that 2.7 tonnes of the suspect beef was exported, while the European Commission said the meat was traced to 13 member states where it was being withdrawn and destroyed.

The scare recalls a 2013 scandal in which horsemeat was passed off as beef and used in ready-to-eat meals sold across Europe.

Brussels will send a team of auditors to Poland to assess the situation on the spot, said Anca Paduraru, a spokeswoman for the European Commission.

French authorities said 795 kilogrammes (1,750 pounds) of beef from the slaughterhouse -- which has now been closed -- had been imported.

More than 500 kilogrammes have already been seized and destroyed, said France's Directorate General of Food.

Around 150 kilogrammes, however, had been "sold to the consumer notably through butcher's shops" which were now attempting to alert customers, an agriculture ministry said in a statement.

Attempts to track down the remaining meat were continuing.

French Agriculture Minister Didier Guillaume said nine French companies had been "duped" into importing beef from the abattoir in Kalinowo, a village some 100 kilometres (60 miles) northeast of Warsaw.

- Lame or diseased? -

Portuguese authorities said they had destroyed 99 kilogrammes of suspect Polish beef, while Romania said it had eliminated 1,432 kilogrammes as a "safety measure".

Sweden's National Food Agency said that just under 100 kilogrammes of the total 239 kilogrammes of suspect Polish beef delivered to the country had already been consumed, while the rest has been seized.

The beef was also exported to the Czech Republic, Estonia, Finland, Germany, Hungary, Latvia, Lithuania, Slovakia and Spain, according to the European Commission.

Story continues

Niemczuk said another seven tonnes were sold to about 20 outlets in Poland but insisted that tests found it did not pose a health risk.

Despite the assurances, Polish beef producers are reeling from the scandal with prices falling by around seven percent since an undercover TV report on the slaughter was aired on Saturday.

"All segments of the Polish (beef) market are worried," Jerzy Wierzbicki, head of the Polish PZPBM meat producers' association, told AFP on Friday.

Wierzbicki insisted that the cows shown in the report by the TVN24 commercial news channel were lame but not diseased.

"They were lame cows... such cattle should not be taken to a slaughterhouse but should rather be put down on the farm by a person who is qualified to do so," Wierzbicki said.

- 'Isolated case' -

"This is an isolated case, concerning a single company, the concerns are unfounded," he said, conceding that the scandal could deal a blow to Polish beef producers who rely on exports.

A leading pork supplier in the European Union, Poland also produced some 415,000 tonnes of beef last year and nearly 90 percent of it was exported, Wierzbicki said.

Poland's Agriculture Minister Jan Krzysztof Ardanowski said on Friday that "pathologies" in the agri-food industry would be "cauterised with a hot iron".

"A police investigation is underway regarding the owners of the slaughterhouse and anyone involved in this process," he said, adding that there was "zero tolerance" for anything that could harm Polish exports.

The criminal probe was launched after TVN24 aired footage of apparently sick or lame cows being dragged across the floor and then butchered.

The TVN24 report said dealers bought lame or sick cattle at much lower prices. A journalist working undercover at the abattoir used a hidden camera to film the secret late night slaughter when veterinary authorities were unlikely to visit.

The European Commission has not commented on the quality of the meat in question, but issued a statement that raised concerns about the treatment of the sick animals, which it insisted could not be considered fit for human consumption.

"The practice of dragging animals unable to walk, as described (in the Polish report) is prohibited by European Union legislation on the protection of animals in slaughterhouses," it said.