Russian prison officials are seeking to scrap a suspended sentence for opposition leader Alexei Navalny and put him behind bars.
Moscow's Simonovsky court told Russian news agencies on Tuesday that it has received a motion from the Federal Penitentiary Service, asking the court to cancel Mr Navalny's three-and-a-half-year suspended sentence that he received when he was convicted in a fraud case in December 2014.
Prison officials have petitioned courts twice previously to cancel the sentence but the motions were struck down.
Mr Navalny was released from jail last week after serving 25 days for organising a wave of protests.
Protests in response to his call swept more than 100 Russian cities and towns on June 12, one of the strongest showings by the marginalised opposition for several years.