Novak made the comments on Russian Rossiya-24 TV after another round of talks ended in Brussels, Reuters said.

Read alsoSefcovic disappointed by outcome of talks on transit of Russia gas via Ukraine

The current gas transit agreement between Moscow and Kyiv expires after December 31. The bulk of Russian gas sent to Europe flows via Ukraine.

There are a number of obstacles to a new deal, such as a political row between Kyiv and Moscow, the war in eastern Ukraine, and litigation between Russian gas supplier Gazprom and Ukraine energy company Naftogaz.