Alexei Navalny with his arms being held behind his back by Russian police officers as he is detained.
Alexei Navalny was detained by Russian police officers during a protest in Moscow.
  • Russian opposition leader Alexei Navalny is now missing, his lawyers say. 
  • They cannot contact him, and prison authorities won't say where he is, his lawyers announced Monday.
  • Navalny is a long-time critic of Russian President Vladimir Putin

Russian opposition leader Alexei Navalny cannot be found in the penal colony where he was carrying out his decadeslong prison sentences, lawyers said Monday.