This was reported by RIA Novosti with reference to the Ukrainian media.
According to Nikolenko, Moscow cannot prohibit Crimeans and residents of Donbass from "communicating with the Ukrainian authorities."
“But Russia ... must clearly adhere to its international legal obligations and fulfill the agreements of the leaders of the Normandy format,” he said.
Earlier, the former Minister of Transport and Communications of Ukraine, ex-deputy of the Verkhovna Rada, Yevgeny Chervonenko, said that Kiev does not intend to "return" Crimea and Donbass, since people in these territories will not vote for the current government.
President Vladimir Putin has repeatedly stressed that the Crimea issue is closed for Russia, and the referendum on the peninsula was held in strict accordance with international law.
Crimea became a Russian region after a referendum was held there in March 2014 - the majority of residents were in favor of reunification with Russia.