Russia and Ukraine are working together on the exchange of various candidates, among them film director Oleh Sentsov, but everything will depend on the president's decision, Kremlin press secretary Dmitry Peskov said.

"Contacts are being maintained. Ukrainian representative for humanitarian affairs in the Minsk Group Medvedchuk is rather active. Various candidates are being discussed. In this case, the joint work is definitely being done," Peskov said, answering a question whether progress in the exchange of Ukrainian film director Sentsov was possible.

"Still, everything will depend, and I can speak only for ourselves, on the final say of the head of state," Peskov said.