KYIV, Jan 22 – National energy company Naftogaz Ukrayiny believes the extension of the gas transit contract with Russia's Gazprom on the current conditions is not advisable, it does not have any guarantees for the volumes of gas transit, Naftogaz Chief Commercial Officer (CCO) Yuriy Vitrenko said.

"In addition to its inconsistency with European rules, interpreted by Gazprom this contract does not contain any guarantees on the volume of transit, that is, after the construction of Nord Stream 2, Gazprom will be able to reduce transit through Ukraine to nil, even if the contract is renewed for future years," he wrote on his Facebook page.