On January 27, searches were carried out in Moscow at once at 14 addresses of FBK (The Anti-Corruption Foundation) employees and supporters of Alexei Navalny, who was detained a few days ago. The searches were carried out as part of a criminal case under part 1 of Article 236 of the Criminal Code of the Russian Federation ("Violation of sanitary and epidemiological rules"), initiated after the actions in support of Navalny on January 23. 
When Russians took to the streets in the tens of thousands on January 23 in the biggest wave of nationwide protests in years to demand the release of jailed opposition leader Aleksei Navalny, there were chants demanding the Kremlin critic's release as well as calls for President Vladimir Putin to step down.
During the arrest, the security forces acted harshly, breaking down the doors of apartments and not allowing lawyers to approach the activists. In the middle of the day, a search began in Alexei Navalny's apartment, where his brother Oleg was at that moment. The security forces immediately broke down the door. The search ended in the evening, after which the police took Oleg Navalny away for interrogation, after which he was detained for 48 hours. This means that he is now a suspect.