"She is still into her hunger strike. Her health took a sharp turn for the worse. She was visited by the members of public monitoring committee yesterday. They found her in a rather critical condition. However, she can still move without help," Polozov said.
Novikov said that Savchenko started having problems with internals.
"There was already some evidence on the specific problems with the gall bladder and kidney, and now we see that these are full blown troubles," he added.
Head of the Human Rights Council (HRC) under the President of Russia Mikhail Fedotov plans to visit Savchenko today.
Earlier, Savchenko, who was captured by pro-Moscow forces ir eastern Ukraine and handed over to Russia last summer, has lost 17 kilograms since going on a water and glucose diet in December.