The lawyer for the Ukrainian pilot Nadia Savchenko has not ruled out that his client has indeed received the documentation necessary for her repatriation.

"I took, as early as April 7, the statement from Nadia Savchenko that she agrees to her transfer to serve time in Ukraine. According to the procedure, she was to receive documents for filling out," Mark Feygin told Interfax by telephone on Wednesday.

He said his colleague, Nikolai Polozov, will visit Savchenko in jail in Novocherkassk, this Friday and help her fill out the papers.

The transfer procedure will take several months, he added. "It is a longer journey than a pardon, which could happen in one day, and we would insist precisely on a pardon," the lawyer said.

Savchenko's sister Vira said in a televised interview, on Wednesday, that the head of the Novocherkassk jail had issued documents for Nadia to fill out in order to be extradited to Ukraine.

On March 22, 2016, the Donetsk Court of the Rostov region found Ukrainian servicewoman, Nadia Savchenko, guilty of killing Russian journalists Igor Kornelyuk and Anton Voloshin, by a group of people by a previous concert on hatred and enmity motives, and sentenced her to 22 years in a penal colony. The court also found her guilty of attempted murder and illegally crossing the Russian border.