Russian authorities on Monday ordered the offices of imprisoned opposition leader Alexei Navalny to halt their activities pending what would be a landmark court ruling on whether they should be outlawed as an extremist group. According to the Associated Press, the injunction from the Moscow prosecutor’s office was another step in a sweeping crackdown on Navalny, President Vladimir Putin’s fiercest critic, and his organizations. The prosecutor’s office petitioned a court this month to label Navalny’s Foundation for Fighting Corruption and network of regional offices as extremist groups.