A Moscow court has sentenced an ally of the Russian opposition leader to five days in jail for organizing a webcast of massive anti-government protests earlier this month.

The court on Thursday found Leonid Volkov guilty of violating the law on demonstrations and agreed with the prosecution's argument that Volkov "organized" the protests by holding a webcast. Volkov is the campaign manager of Alexei Navalny, Russia's most popular opposition leader who wants to run for president next year.

Tens of thousands took to the streets in some of the most widespread anti-government protests earlier this month. They were called for by Navalny, who himself was sentenced to jail for 25 days for staging the rallies. Another ally of Navalny's was sent to jail for 10 days and released earlier on Thursday.