Polish health authorities have ordered more than 200 tonnes of food be withdrawn from the market as it is suspected of containing industrial salt.
It is the latest development in a scandal that has raised fears about food safety.
Revelations that industrial salt, which is used for treating roads in winter and is feared to contain toxins, was sold to food producers have prompted authorities to open a criminal investigation and run some 500 tests on food samples.
Laboratory tests so far have found that the amounts of dioxins and heavy metals in the salt are minimal and unlikely to harm human health.
Nonetheless, the Chief Sanitary Inspectorate said today it had ordered the withdrawal of suspect food as a precaution.