Russian opposition leader Alexei Navalny is suing a prison for withholding the Koran which he intended to study while serving time in detainment outside Moscow.
Mr Navalny is serving two-and-a-half years in prison for violating the terms of his probation from a 2014 embezzlement conviction which Mr Navalny has rejected as fabricated, and the European Сourt of Human Rights found it "arbitrary and manifestly unreasonable".
Before his arrest, Mr Navalny spent five months recovering from a nerve-agent poisoning that he blamed on the Kremlin. Russian authorities have rejected the accusation.