
Lithuanian authorities said the ban on transit through the country's territory towards the Russian enclave of Kaliningrad of goods subject to EU sanctions would come into force from Saturday.
News of the ban came Friday, through a video posted by the region's governor Anton Alikhanov.
The EU sanctions list includes coal, metals, construction materials and advanced technology in particular, and Alikhanov said the ban would cover about 50 percent of items it imports Kaliningrad.
Its immediate start was confirmed by lithuania's state rail service cargo arm in a letter to customers following "clarification" by the European Commission on the sanctions enforcement mechanism.
Urging citizens not to panic, Alikhanov said two ships were already carrying goods between Kaliningrad and St. Petersburg and another seven would be in service by the end of the year.
"Our ferries will handle all loads" he said on Saturday.
A spokesman for Lithuania's railway service confirmed the contents of the letter, but declined to comment further.
Lithuanian Deputy Foreign Minister Mantas Adomenas told the public broadcaster that his institution was waiting for "clarification from the European Commission for the implementation of European sanctions for the transit of goods in Kaliningrad".
Located between EU and NATO members Poland and Lithuania, Kaliningrad receives supplies from Russia via railways and gas pipelines through Lithuania.
Home to the headquarters of the Russian Baltic Sea fleet, the enclave was taken from Nazi Germany by the Red Army in April 1945 and handed over to the Soviet Union after World War II.