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

The current gas transit agreement between Moscow and Kiev expires after Dec. 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 Kiev and Moscow, a pro-Russian insurgency in eastern Ukraine, and litigation between Russian gas supplier Gazprom and Ukraine energy company Naftogaz.

(Reporting by Vladimir Soldatkin and Polina Devitt; editing by Jonathan Oatis)