Russia has opened a criminal investigation into two exiled allies of jailed Kremlin critic Alexei Navalny for raising funds for organization’s that Moscow has declared “extremist”, Russia’s Investigative Committee said on Tuesday.

The case was opened against Leonid Volkov and Ivan Zhdanov and other individuals, the law enforcement agency said in a statement. A Russian court this summer branded Navalny’s political movement extremist amid an opposition crackdown