The Minister of Internal Affairs Yury Lutsenko reported to journalists about it.
"We made official request to appropriate authorities of the Russian Federation with a request to provide the relevant information. Also all power structures work with the operational opportunities to have more information on this question", - the minister told.
He didn't specify an assessment of the Ministry of Internal Affairs of number of Ukrainians with the Russian nationality.
The minister noted that at present there is no legislative possibility of any measure of punishment for persons with a dual citizenship.
According to Lutsenko to avoid issue of passports of other countries to the Ukrainian citizens, it is necessary to raise social standards.
"A key to the solution of this question is improvement of social standards and safety in the territory of Ukraine for any citizens", - the minister told.
We will remind, the party "The All-Ukrainian association "Freedom" demands from the Ministry of Internal Affairs to check existence of nationality of Russia at the management of the Crimea.
The deputy of Rada from the "Our Ukraine — National Self-defense" Block, the chairman of committee of the Verkhovna Rada on national security and defense Anatoly Gritsenko supports examination by intelligence services of number of Ukrainians which have a dual citizenship.
The deputy of Rada Moustapha Dzhemilev (NUNS) considers possible introduction of a dual citizenship menacing to territorial integrity of the state and provoking repetition in the Crimea the situation similar developed in South Ossetia.
The dual citizenship in Ukraine is legislatively forbidden.