Kyiv and Moscow had negotiations as for which companies could evaluate the gas transport system of Ukraine and which Russian gas fields could participate in a future joint enterprise, Gazprom CEO Alexei Miller told Ukrainian journalists in the capital of Russia on Wednesday.

"We already had negotiations, considered which companies could make an assessment of the Ukrainian gas transport system and our extraction fields," he noted.

According to Miller, the Ukrainian party has already named a range of companies that could be involved in this work.

This spring, the Russian leadership offered the unification of Gazprom and Naftogaz into a joint venture on a parity basis, which could include extraction and gas transporting assets from the Ukrainian side, and gas fields of the same value from the side of Gazprom.

Gazprom has already submitted a list of gas fields that could participate in the joint venture.