Jailed Pussy Riot member Nadezhda Tolokonnikova, who is on the fifth day of a hunger strike, has been transferred to a prison hospital.
Tolokonnikova's husband, Pyotr Verzilov, said on September 27 that the authorities of the penal colony in Russia's central Republic of Mordovia placed his wife in the penitentiary's medical unit after she felt unwell.
Earlier in the day, Tolokonnikova accused prison officers of taking away her drinking water.
Authorities at the penal colony in Russia's Republic of Mordovia, where she is jailed, denied the claim.
In a message made public by her husband, Pyotr Verzilov, Tolokonnikova said on September 27 that a prison guard told her that her drinking water would be taken away and then an inmate accompanying him grabbed her by the arms and removed the water.
Tolokonnikova is serving a two-year prison term for a protest performance against President Vladimir Putin in a Moscow cathedral.
She began a hunger strike to protest prisoners being forced to work excessive hours and an alleged death threat by a prison official.
She said she was moved to an "isolation cell" on September 27.
Based on reporting by AFP and Interfax