KYIV, Dec 4 – A delay in unbundling by national energy company Naftogaz Ukrayiny puts under threat the signing of new long lasting contract on transit of Russian gas across Ukraine, and the immediate steps should be made today, Energy Community Secretariat Director Janez Kopac said.

"The EU in trilateral talks with Russia cannot help if it doesn't have a key argument for long lasting transit contract, certified transmission system operator," he said in a video address to the participants of the meeting of stakeholders in Brussels on November 29 and published by the Energy Community on Monday.