On Tuesday, a Moscow court sentenced journalists Antonina Favorskaya, Sergey Karelin, Konstantin Gabov, and Artem Kriger to 5.5 years in prison on charges of participating in an “extremist organization.” The case stems from the defendants’ alleged participation in creating content for the YouTube channels of the late opposition politician Alexey Navalny’s Anti-Corruption Foundation (FBK). All of them have denied collaborating with the organization. The details of the charges remain unknown, as the hearings were held behind closed doors. Here’s what you need to know about these four journalists who are headed to prison for their work.