Ukrainian Verkhovna Rada Human Rights Commissioner Liudmyla Denisova expects Russia to provide relevant and true information about the health of Ukrainian filmmaker Oleh Sentsov, who was convicted of terrorism in Russia and has been on hunger strike for more than four months.

Denisova wrote on her Facebook page on Friday that she had received a letter from Chairman of the Russian Presidential Human Rights Council Mikhail Fedotov.

"The information provided by him [Fedotov] indicates that doctors from the Labytnangi hospital held a conference [on Sentsov's case] on September 12. They assessed the state of Oleh's health as stable. Another doctors' conference is expected to take place before October 3 to once again assess the condition of Oleh's health and [determine] a strategy for his further treatment," Denisova wrote.

Sentsov is under medical surveillance due to his musculoskeletal disorders, she wrote.

"He has been receiving a nutrient formula and daily intravenous injections since June 8," Denisova wrote.

However, she questioned the authenticity of the information provided to her and the quality of Sentsov's medical checkup.

"Unfortunately, besides this information, not a single medical document confirming [Sentsov's condition] has been given to me by the Russian Federation, even though I have been insisting on it for a long time now. There has been no official medical assessment issued by a council of doctors, either," she wrote.

"I hope that Russia will send official medical documents detailing Oleh's true health status in the near future," Denisova wrote.

In August 2015, the North Caucasus District Military Court in Rostov-on-Don sentenced Sentsov, who was detained in Crimea in 2014, to 20 years in a high-security penitentiary for plotting a terrorist attack there.

Sentsov went on hunger strike on May 14, 2018 and demanded that all Ukrainians held in Russia for political reasons be freed.