Ukraine has to give the eastern regions which are part of the separatist movement veto power over future membership in NATO and European Union to end the movement, a former envoy of Russian President Vladmir Putin told Bloomberg.

Vladmir Lukin said that the region, where Russian is the main language, has no interest in being a part of NATO.

"Eastern Ukraine, or most of it, as far as I'm aware, doesn't want to be part of NATO. Russia is also against this, but the main thing is that eastern Ukraine is opposed and has made it abundantly clear," Lukin said.

The easternmost regions of Donetsk and Luhansk regions should also be granted control over their security forces, he said. "The guarantees for eastern Ukraine are very simple. Each region must have the right to express its will. This is my personal view, of course. It's not up to me."

Lukin, 77, was the Russian ambassador to the U.S. in 1992-1994.

Ukraine's current president, Petro Poroshenko, and Putin reach a deal last week that led to a cease-fire and talks of decentralization of power, Bloomberg reported.

The talks were also attended by the foreign ministers of Germany, France and Poland, and Viktor Yanukovych agreed to hold early presidential elections by December and form a national unity government.

But within hours of agreeing, he was forced to flee Kiev for Russia following a violent overthrow.

The idea of a direct election is needed in order for the regions to succeed, Lukin said.

"A monolithic state is a leftover of the Stalinist model of development, when even such questions as how many boxes of nails should be sent from Vladivostok to Petropavlovsk are decided by the Politburo. This is an acute problem for Russia, too," he told Bloomberg.

But in the meantime, Poroshenko is pursuing a safer status for his country.

He said, at the Yalta European Strategy conference in Kiev, that Ukraine wants to be a non-NATO ally, putting it in a category with about 50 other countries in the world.

Poroshenko told told those in attendance at the conference that the move would help establish peace and stability.