Ukraine may seek the extradition of deputy chairman of the Mejlis of the Crimean Tatar people Akhtem Chiygoz, who is convicted in Russian-annexed Crimea, Chairman of the Mejlis and Member of Parliament of Ukraine from the Petro Poroshenko Bloc faction Refat Chubarov has said.

"We and lawyers have already drawn up a further plan how to save Akhtem Chiygoz, how to release other political prisoners," he said at a rally in support of Chiygoz in Kyiv on Wednesday.

At the same time, he admitted that the final decision is with the president of the Russian Federation.

"By taking legal action, by appealing and moving to the European Court of Human Rights, we will simultaneously try to force Russia to extradite, return Akhtem Chiygoz to Ukraine," Chubarov said.

There are all grounds for this, he said.

The fact that the verdict of the "Supreme Court" of annexed Crimea calls Chiygoz as a citizen of Ukraine gives a certain chance and leverage to use this instrument.

On September 11, the so-called "Supreme Court" of annexed Crimea sentenced Chiygoz to eight years in prison. He will serve his sentence in a penal colony.

Chiygoz was arrested on January 29, 2015, on charges of organizing and participating in civil unrest at a rally in Simferopol on February 26, 2014, prior to the referendum on Crimea's accession to Russia.