He said that during a meeting between Russian leader Vladimir Putin and President of Belarus Alexander Lukashenko, they discussed what has been achieved since the negotiations in Sochi.

“We had a very intense and very effective work that we carried out with (First Deputy Prime Minister of Belarus. - RT ) Dmitry Nikolayevich Kruty, my counterpart, on this issue,” TASS quoted Oreshkina.

He added that at present “there are three groups of issues that block the final agreements: these are agreements in the oil sector, agreements in the gas sector and agreements in the tax sphere”.

Earlier, Belarusian Ambassador to Russia Vladimir Semashko said that the parties to the negotiations in Sochi agreed on draft integration roadmaps for the electric power industry and customs cooperation issues.