Kremlin critic Navalny says he is in solitary confinement

Alexei Navalny appears on a video screen set up at Moscow City Court, in May (Russian Federal Penitentiary Service/AP)

Imprisoned Russian opposition leader Alexei Navalny says prison officials ordered him to serve at least three days in solitary confinement, citing a minor infraction, in retaliation for his activism behind bars.

A post about the punishment appeared in Navalny’s social media accounts on Monday.