Russia has suspended all imports of fresh vegetables from the EU after the E.coli outbreak.
On Monday, amid initial claims from Germany that the outbreak was due to imports of Spanish cucumbers into the country, Russia banned the import and sale of Spanish and German vegetables.
Tests have since confirmed the cucumbers were carrying a different strain to the one that has been responsible for the illnesses.
However, Russia's consumer safety service said that, with the source of the outbreak still undetermined, it would prevent the entry and sale of fresh vegetables from all EU member states.
The outbreak, which began in Germany, has led to 18 deaths and hundreds more are seriously ill.