Igor Demin, adviser to the President of Transneft, told RIA Novosti.

“We received an appeal from Ukrtransnafta.

We are studying these proposals, preparing relevant reports to the state bodies of Russia - the Federal Antimonopoly Service and the Ministry of Energy," he said.

As Bloomberg reported, next year Ukraine plans to increase the payment for the transit of Russian oil via the Druzhba pipeline to Eastern Europe by €2.1 per ton, to €13.6.