The amendments to a 2022 government decree on sanctions imposed over Russia's aggression take effect the day after publication, Tsahkna said.
"Russia attacks Ukrainian ports, blocks the export of Ukrainian grain, and then looks for new routes for its own. Estonia will not provide such routes," Tsahkna wrote on X.
He said he had warned in September that no one should make plans to transport Russian grain through Estonia. According to the minister, Tallinn will not help Russia "finance the war or make it easier for it to wage aggression."
Estonia is discussing ending the transit of Russian grain through Baltic ports together with Latvia and Lithuania. Latvia previously announced plans to introduce a 300% duty on grain from Russia and Belarus.
In 2024 the EU introduced additional duties on agricultural products from Belarus and Russia - grains, oilseeds and processed products, including wheat and corn. Those measures did not cover transit to third countries.
The Financial Times, citing sources, reported that the duty would amount to 95 euros per ton of grain. The outlet's sources said at the time that the decision would drive prices up by at least 50%, which would completely destroy demand.
EU imports of such products from Russia reached a record 4 million tons in 2023, accounting for 1% of total consumption in the bloc. Amid problems with exports through the Black Sea, the Kremlin is trying to preserve Russia's status as the largest wheat exporter, Bloomberg wrote. According to the outlet, the authorities urged the largest exporters to find ways to maintain the volume of supplies abroad. Bloomberg noted that leadership in the global grain market gives Moscow not only revenue but also the ability to use supplies as an instrument of geopolitical influence.