Fears are growing for Vladimir Putin's main opposition leader Alexei Navalny after he was shown looking gaunt and frail after solitary confinement.
Navalny was put inside a dungeon-like space in Penal Colony 6 in Melekhovo.
He has earned the wrath of Putin for standing up to him and gaining supporters, appealing for a democratic Russia instead of the one currently blighted by Putin's oppression.