“Russia’s response to Lithuania’s restriction of transit to Kaliningrad has been being worked out since Saturday, the regional authorities are working with the Foreign Ministry,” RIA Novosti quotes him as saying.

Alikhanov noted that the retaliatory measures of the Russian side would be extremely painful.

Earlier, the head of the Lithuanian Foreign Ministry, Gabrielius Landsbergis, said that Lithuania had imposed a ban on the transit of goods to the Kaliningrad region after consultations with the European Commission and on its recommendation.

Russian presidential spokesman Dmitry Peskov called Lithuania's decision to restrict transit to the Kaliningrad region illegal.

The Russian Foreign Ministry demanded that Lithuania immediately lift the restrictions imposed on the rail transit of part of the cargo to the Kaliningrad region, otherwise the Russian side reserves the right to act to protect its national interests.