In a joint letter, the foreign ministers of the Czech Republic, Denmark, Estonia, Finland, Iceland, Ireland, Latvia, Lithuania, Norway, Poland, Romania and Sweden are calling on the G7 states to take additional measures to cut the Russian Federation's revenues from the sale of its energy carriers."With these revenues, Russia is funding its continuing aggression in Ukraine. A third of Russia's revenues and two thirds of its exports are linked to energy carriers," reads a press statement released by the Romanian Foreign Ministry (MAE) on Friday.According to MAE, the 12 states have consistently supported the adoption of the toughest possible restrictive measures against Russia.The G7 is thus encouraged to use a price cap on oil as an effective tool to limit Russian revenues, to impose additional sanctions on vessels involved in Russia's shadow fleet and those associated with it, and to consider further measures targeting the maritime transportation of Russian-origin export goods."Russia is using the shadow fleet to fund its war machine. The vessels of the shadow fleet are often old and in poor condition, posing environmental, maritime safety and security risks in Europe and our waters," according to the joint statement.