Authorities in Moscow on Thursday designated the prisoner rights group Russia Behind Bars and three of its affiliates as “undesirable,” making their work illegal in Russia and putting staff members at risk of jail time. Russia’s Prosecutor General’s Office banned the German non-profitRussland hinter gittern — Russia Behind Bars’ legal entity — the MRR-Fund gemeinnützige, as well as the Czech prisoner rights group Za vaši a naši svobodu and the human rights festival Kulturus. The law enforcement body said it had “established that these organizations operate under a common leadership,” accusing …