Investigators stand at the entrance to an apartment building where Russia opposition leader Sergei Udaltsov lives, Moscow, Wednesday, Oct. 17, 2012. In a new sign of a widening crackdow

 

              Investigators stand at the entrance to an apartment building where Russia opposition leader Sergei Udaltsov lives, Moscow, Wednesday, Oct. 17, 2012. In a new sign of a widening crackdow
Investigators stand at the entrance to an apartment building where Russia opposition leader Sergei Udaltsov lives, Moscow, Wednesday, Oct. 17, 2012. In a new sign of a widening crackdown on Russian opposition, investigators on Wednesday opened a criminal probe against leftist leader Sergei Udaltsov and several other opposition activists for their alleged role in plotting mass riots. (AP Photo/Mikhail Metzel)